Twelker, Evan
Hubbard, T.D.
Wypych, Alicja
Sicard, K.R.
Newberry, R.J.
Reioux, D.A.
Freeman, L.K.
Lande, L.L.
2015
Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska
report and digital data
Preliminary Interpretive Report
PIR 2015-6
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
16 p., 1 sheet, scale 1:50,000.
http://dx.doi.org/10.14509/29470
The Alaska Division of Geological & Geophysical Surveys (DGGS), in partnership with the U.S. National Cooperative Geologic Mapping Program, mapped approximately 450 mi2 of the Talkeetna Mountains region of central Alaska at 1:50,000 scale over the course of six weeks in 2014. This area contains significant exposures of Late Triassic mafic volcanics and gabbro sills that have been the focus of region-wide exploration for the Strategic and Critical platinum-group elements (PGEs). The area also exposes numerous inactive and possibly active faults which project through the area of proposed hydropower development. The resulting geologic map offers an improved understanding of the geology, structural history, and mineral potential of the area.
The Alaska Division of Geological and Geophysical Surveys (DGGS) initiated a multi-year project to improve the understanding of mineral potential in western Wrangellia. The project began in 2013 with acquisition of magnetic and electromagnetic (EM) geophysical data over unsurveyed portions of the terrane in the Clearwater and Talkeetna Mountains. DGGS geologists completed a three week field program of geologic mapping, rock, and stream sediment sampling in 2013, and followed up with 1:50,000-scale mapping of the Talkeetna Mountains C-4 Quadrangle during the 2014 field season.
>border: A polygon that encompasses the geographic extent of the data observations.
>ContactsAndFaults: Line features depicting faults and geologic contacts
>DataSourcePolys: Polygons that delineate data sources for various parts of the map
>FossilPoints: Fossil location points
>GeochronPoints: Geochronology sample location points
>GeologicLines: Dikes, coal seams, ash beds, glacial features, anticline and syncline hinge-surface traces, and other kinds of key beds that do not participate in map-unit topology
>MapUnitPolys: Polygons that record the distribution of mapped or interpreted geologic units
>OrientationPoints: A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.)
>Stations: A point file that provides location information, observations, and other data specific to each field observation station.
2013
2014
ground condition
None planned
-149.024852
-148.355520
62.757514
62.348564
ISO 19115 Topic Category
geoscientificInformation
Alaska Division of Geological & Geophysical Surveys
40Ar/39Ar
Aerial Geology
Aerial Photography
Alluvial
Alluvial Deposits
Amphibolite Facies Units
Bedrock Geologic Map
Bedrock Geology
Brachiopods
Colluvial Deposits
Cordilleran Ice Sheet
Crinoids
Esker
Faulting
Faults
Floodplain
Fluvial
Fossils
Geochronology
Geologic Map
Geologic Materials
Geomorphology
Glacial
Glacial Deposits
Glacial Drift
Glacial Geology
Glacial Geomorphology
Glacial History
Glacial Lake
Glacial Processes
Glacial Stratigraphy
Glaciation
Ice Contact Deposits
Ice-Contact
Lacustrine
Lacustrine Sedimentation
Landslide
Landslide Deposit
Outwash
Outwash Fan
Paleochannel
Permafrost and Periglacial
Remote Sensing
Rock Glaciers
Rock-Glacier Deposits
Rockfall
STATEMAP Project
Sand and Gravel
Slides
Slope Instability
Soil Creep
Surficial
Surficial Geologic Map
Surficial Geology
Till
Alaska Division of Geological & Geophysical Surveys
Cleary Creek
Iron Creek
Stephan Lake
Talkeetna Mountains
Talkeetna Mountains Quadrangle
Talkeetna River
Alaska Division of Geological & Geophysical Surveys
Kahiltna Terrane
Skolai Group
Slana Spur Formation
Station Creek Formation
Wrangellia Terrane
Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America
Cenozoic
Cretaceous
Eocene
Jurassic
Late Triassic
Mesozoic
Paleocene
Paleogene
Paleozoic
Pennsylvanian
Permian
Pleistocene
Quaternary
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
Alaska Division of Geological & Geophysical Surveys
GIS Manager
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
dggsgis@alaska.gov
8 am to 4:30 pm, Monday through Friday, except State holidays
This project is jointly funded by the State's Strategic and Critical Minerals Assessment program (part of the Airborne Geological/Geophysical Mineral Inventory [AGGMI]) and the USGS National Cooperative Geologic Mapping Program, STATEMAP component, under award number G14AC00167 for 2014. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. We acknowledge Cook Inlet Region Inc. (CIRI), Chickaloon Moose Creek Native Association, Knikatnu, Ninilchik Natives Association, Salamatof Native Association, Seldovia Native Association, and Tyonek Native Corporation for supporting the project and providing access to private lands in the mapping area. Brenda Becker of the Bureau of Land Management (BLM) Glennallen Field Office assisted us with permitting on BLM-managed lands. We thank Peter Oswald, Jeanine Schmidt, Melanie Werdon, Ben Porterfield, David Adams, Laurel Burns, Ken Ridgway, and others for geological discussions that helped us prepare for the field and understand our results when we returned. Jeff Benowitz and Paul Layer of the University of Alaska Fairbanks (UAF) Geochronology Lab provided 40Ar/39Ar analyses and assisted us in their interpretation, and Ken Severin of the UAF Advanced Instrumentation Laboratory assisted us with the microprobe. Scott Arko of the UAF Alaska Satellite Facility furnished us with orthorectified areal imagery. We appreciate the attempts of Paul O'Sullivan and GeoSep Services to recover zircons from some of our undated map units. Robert Blodgett provided us with fossil identifications and supporting discussions. Melanie Werdon and De Anne Stevens gave timely and constructive reviews. We appreciate the warm hospitality and logistical support of Jessi Braga and Stephan Lake Lodge, and we thank Alpine Air Alaska pilots Martin Hoessinger and Jared Berman for skilled and safe flying.
Benowitz, J.A.
Layer, P.W.
Wypych, Alicja
Twelker, Evan
2015
40Ar/39Ar data from the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska
Raw Data File
RDF 2015-10
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
19 p
http://dx.doi.org/10.14509/29454
Benowitz, J.A.
Layer, P.W.
Twelker, Evan
2014
40Ar/39Ar data from rocks collected in 2013 in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska
Raw Data File
RDF 2014-18
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
10 p
http://dx.doi.org/10.14509/29119
Twelker, Evan
Bachmann, E.N.
Freeman, L.K.
Newberry, R.J.
Reioux, D.A.
Sicard, K.R.
Tuzzolino, A.L.
Wright, T.C.
Wypych, Alicja
2014
Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska
Raw Data File
RDF 2014-3
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
6 p
http://dx.doi.org/10.14509/27181
Twelker, Evan
Newberry, R.J.
Freeman, L.K.
Sicard, K.R.
Reioux, D.A.
Bachmann, E.N.
2013
DGGS geologic and mineral-resource assessment of the western Wrangellia terrane, central Alaska: Initial progress report (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 4-10, 2013
Poster and Presentation
Twelker, Evan and others, 2013
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
25 p
http://dx.doi.org/10.14509/26821
Twelker, Evan
Wypych, Alicja
Sicard, K.R.
Newberry, R.J.
Freeman, L.K.
Reioux, D.A.
Lande, Lauren
2014
Preliminary results from 2014 geologic mapping in the Talkeetna Mountains, Alaska (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 3-9, 2014
Poster and Presentation
Twelker, Evan and others, 2014
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
28 p
http://dx.doi.org/10.14509/29160
Twelker, Evan
Wypych, Alicja
Newberry, R.J.
2014
New Data and Insight on the Late Triassic Wrangellia Magmatic Ni-Cu-Co-PGE System in the Talkeetna Mountains, Central Alaska (poster): Society of Economic Geologists 2014 Conference, September 27-30, 2014
Poster and Presentation
Twelker, Evan and others, 2014
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet
http://dx.doi.org/10.14509/29139
Twelker, Evan
Burns, L.E.
2014
New geochemical and geophysical data from the western Wrangellia minerals assessment area (presentation): Alaska Miners Association 24th Biennial Mining Conference, Fairbanks, Alaska April 7-13, 2014
Poster and Presentation
Twelker, Evan and Burns, L.E., 2014
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
34 p
http://dx.doi.org/10.14509/27284
Wypych, Alicja
Twelker, Evan
Freeman, L.K.
Lande, Lauren
Newberry, R.J.
Reioux, D.A.
Sicard, K.R.
2014
Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska
Raw Data File
RDF 2014-22
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
4 p
http://dx.doi.org/10.14509/29140
Certainty in identification of the map units varies due to the scale and interpretive nature of the mapping. The geologic unit interpretations and boundaries presented in this map result from interpretation of false-color infrared aerial photographs, investigative traverses throughout the map area, aerial reconnaissance via helicopter, examination of exposures, geochemistry and geochronology analysis, and interpretation of geophysical survey data. The air-photo interpretations were adjusted as needed to be consistent with bedrock exposures identified by field geologists. Per NCGMP09 (USGS National Cooperative Geologic Mapping Program - Draft Standard Format for Digital Publication of Geologic Maps) specifications, the authors have assigned a confidence value to each polygon and line segment to indicate their degree of confidence in the positioning and identification of the element at the mapped scale. This publication is a PRELIMINARY INTERPRETIVE REPORT and is meant to allow rapid release of field observations or initial interpretations of geology or analytical data. It has not undergone formal peer review. Interpretations or conclusions contained in this publication are subject to change.
Polygon topology was implemented per NCGMP09 specifications (polygons must not overlap, polygons must not have gaps, boundaries must be overlain by lines in ContactsAndFaults). All polygon features were topologically validated using ArcGIS for Desktop prior to export to shapefile format.
This report and digital dataset provides information about geologic features that can be identified or interpreted at a scale of 1:50,000. Relative to preexisting mapping, it offers an improved understanding of the geology, structural history, and mineral potential of the area. However, significant additional work would be required to fully resolve uncertainties in our interpretations.
Mappers recorded observations on 1:63,360 scale (nominal) color-infrared aerial photographs and 1:63,360 scale USGS topographic base maps. The authors believe the total horizontal accuracy of directly observed mapped geologic contacts is on the order of 25 m or better, with somewhat lesser accuracy expected in areas of rugged relief. Per NCGMP09 specifications, the authors have assigned a confidence value to each polygon, line, or point to indicate their degree of confidence in the positioning and identification of the element at the mapped scale. Waterlines and waterbody polygons were entirely derived from topographic base maps, consequently it is possible that the mapped location and extent of these features may differ from modern ground conditions.
Burns, L.E.
Geoterrex-Dighem
WGM, Inc.
Emond, A.M.
Graham, G.R.C.
2014
Iron Creek airborne electromagnetic and magnetic geophysical survey data compilation
Geophysical Report
GPR 2014-6
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
http://dx.doi.org/10.14509/27360
digital data
2014
publication date
Burns, L.E. and others, 2014
bedrock geologic interpretation
Clautice, K.H.
Newberry, R.J.
Blodgett, R.B.
Bundtzen, T.K.
Gage, B.G.
Harris, E.E.
Liss, S.A.
Miller, M.L.
Reifenstuhl, R.R.
Clough, J.G.
Pinney, D.S.
2001
Bedrock geologic map of the Chulitna region, southcentral Alaska
Report of Investigation
RI 2001-1A
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
31 p., 1 sheet, scale 1:63,360
http://dx.doi.org/10.14509/2768
63360
paper
2001
publication date
Clautice, K.H. and others, 2001
bedrock geologic interpretation
Schmidt, J.M.
Werdon, M.B.
Wardlaw, Bruce
2003
New mapping near Iron Creek, Talkeetna Mountains, indicates presence of Nikolai greenstone
Professional Report
PR 120J
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
p. 101-108
http://dx.doi.org/10.14509/2917
paper
2003
publication date
Schmidt, J.M. and others, 2003, p. 101-108
bedrock geologic interpretation
Werdon, M.B.
Riehle, J.R.
Schmidt, J.M.
Newberry, R.J.
Pessel, G.H.
2002
Geologic map of the Iron Creek area, Talkeetna Mountains B-5 Quadrangle, Alaska
Preliminary Interpretive Report
PIR 2002-4
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet, scale 1:63,360
http://dx.doi.org/10.14509/7144
63360
paper
2002
publication date
Werdon, M.B. and others, 2002
bedrock geologic interpretation
Bedrock geologic interpretation - In 2014, Alaska Division of Geological & Geophysical Surveys (DGGS) bedrock geologists traversed and collected rock samples throughout a 450-square-mile area about 50 miles east of the town of Talkeetna. This work was integrated with findings from 2013 fieldwork in the western Wrangellia terrane, geophysical surveys of the area, and with existing literature and unpublished DGGS mapping conducted during the mid-80s. Geologists observed details about the variations in texture, lithology and orientation of the map units and collected rock samples, noted outcrop descriptions, and conducted structural measurements. Selected samples were submitted for geochronologic and geochemical analysis and the results were used to further interpret the stratigraphic and structural history of the map area. A complete list of references can be found in the accompanying report.
Burns, L.E. and others, 2014
Clautice, K.H. and others, 2001
Schmidt, J.M. and others, 2003, p. 101-108
Werdon, M.B. and others, 2002
2014
Surficial geologic interpretation - Reconnaissance surficial geologic field work was conducted during the summer of 2014. Observations of river banks and deposits, debris flow deposits, glacial deposits and features, and lake and swamp deposits were recorded for use during subsequent interpretation of false-color infrared aerial photographs.
2014
Digitization of geologic map data - Field observations and rock sample descriptions were compiled into an ArcGIS geodatabase. The observation records were organized and attributed according to the NCGMP09 geodatabase standard. Bedrock point data of locations of structural observations (strike, dip, cleavage, jointing, etc.) were intersected with the surficial-geologic polygons in order to identify locations that were mapped as surficial materials based on aerial photography but were found to have small exposures that were desirable to be mapped as bedrock. These areas were then modified in the surficial-geologic polygons to be areas of bedrock exposure. Waterbody lines and polygons were digitized from the underlying topographic base-maps and incorporated into the geodatabase.
2015
vector
Universal Transverse Mercator
6
0.999600
-147
0
500000.000000
0
coordinate pair
.00000001
.00000001
Meters
North American Datum of 1927
Clarke 1866
6378206.4
294.9786982
pir2015-6-border.shp
A polygon that encompasses the geographic extent of the data observations.
Alaska Division of Geological & Geophysical Surveys
border
pir2015-6-ContactsAndFaults.shp
Line features depicting faults and geologic contacts
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
ContactsAndFaults
Type
Specifies the kind of feature represented by the line
Alaska Division of Geological & Geophysical Surveys
The line features are: Fault, Surficial Contact, Contact, and Inferred thrust fault
IsConceale
This is a flag to identify contacts and faults covered by an overlying map unit.
Alaska Division of Geological & Geophysical Surveys
N
The feature IS NOT covered by an overlying map unit.
Alaska Division of Geological & Geophysical Surveys
Y
The feature IS covered by an overlying map unit.
Alaska Division of Geological & Geophysical Surveys
ExistenceC
Indicates the degree of confidence and/or certainty in the interpretation of a each line segment's existence.
Alaska Division of Geological & Geophysical Surveys
Certain
Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
Alaska Division of Geological & Geophysical Surveys
Questionable
The interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.
Alaska Division of Geological & Geophysical Surveys
IdentityCo
Indicates degree of confidence in the identification and classification of the line segment.
Alaska Division of Geological & Geophysical Surveys
Certain
Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
Alaska Division of Geological & Geophysical Surveys
Questionable
The interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.
Alaska Division of Geological & Geophysical Surveys
LocationCo
Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available.
Alaska Division of Geological & Geophysical Surveys
10
250
meters
Symbol
References the symbol value that was assigned to the line segment.
Alaska Division of Geological & Geophysical Surveys
FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.
Label
Formal name of selected features.
Alaska Division of Geological & Geophysical Surveys
The labeled features are: SLOT LAKE FAULT, CENTRAL RAINGELLIA FAULT, and RANGE FRONT FAULT
Notes
Free text for additional information about the feature.
Alaska Division of Geological & Geophysical Surveys
The notes indicate the basis of the feature interpretation: "Inferred from SDMI IfSAR orthorectified radar intensity image", "Adapted from Adams and others (1985; unpublished) Plate 1", "Adapted from Oswald (2006) Map B", "Break in 900Hz EM", "Location inferred from airborne magnetic survey", and "Location inferred from airborne resistivity survey"
pir2015-6-DataSourcePolys.shp
Polygons that delineate data sources for various parts of the map
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
DataSourcePolys
Notes
Free text for additional information about the feature.
Alaska Division of Geological & Geophysical Surveys
The notes indicate the basis of the feature interpretation: "Oswald, 2006 (Map B)", "Adams and others, 1985 (unpublished) (Plate 2)", "Rose, 1967 (GR 32)", "Amos and Cole, 2001 (Map B)", "Oswald, 2006 (Map A)", "Adams and others, 1985 (unpublished) (Plate 1)", and "Van Wyck, 2006 (Figure 6)"
pir2015-6-FossilPoints.shp
Fossil location points
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
FossilPoints
StationID
Identifier assigned by person who originally located station
Alaska Division of Geological & Geophysical Surveys
Generic example of a sample identifier: YYYYAAA9999X: YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.
Label
Text string to display along with station symbol
Alaska Division of Geological & Geophysical Surveys
free text that is intended to display adjacent to the label point on the map
MaterialAn
Material analyzed
Alaska Division of Geological & Geophysical Surveys
free text description of the rock sample; transcribed from geologists' field notes
PlotAtScal
The scale at which the observation should be plotted
Alaska Division of Geological & Geophysical Surveys
50000
50000
LocationCo
Radius in meters of positional uncertainty envelope
Alaska Division of Geological & Geophysical Surveys
10
10
meters
FossilForm
Information about the type or form of the fossil
Alaska Division of Geological & Geophysical Surveys
free text description of the fossil
FossilAge
Information about the age of the fossil
this study (R.B. Blodgett)
free text description of the fossil age
Notes
Free text for additional information about the feature
Alaska Division of Geological & Geophysical Surveys
The notes indicate the source of the feature interpretation: " and "this study (R.B. Blodgett)"
pir2015-6-GeochronPoints.shp
Geochronology sample location points
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
GeochronPoints
Type
The geochronology method used to provide the age value
Alaska Division of Geological & Geophysical Surveys
The samples were analyzed by: ArAr
StationID
Identifier assigned by person who originally located station
Alaska Division of Geological & Geophysical Surveys
Generic example of a sample identifier: YYYYAAA9999X: YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.
MapUnit
Short ASCII string that indicates the map unit.
Alaska Division of Geological & Geophysical Surveys
Khg
HORNBLENDE GABBRO (Cretaceous)
Alaska Division of Geological & Geophysical Surveys
PPva
ALTERED METAVOLCANIC ROCKS (Pennsylvanian to Permian)
Alaska Division of Geological & Geophysical Surveys
Trg1
GABBRO, AFFILIATED WITH UNIT Trn1 (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Trr1
LOWER RHYOLITE (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Jgd
GRANODIORITE TO TONALITE (Middle Jurassic)
Alaska Division of Geological & Geophysical Surveys
Kg
GRANITIC ROCKS (Late Cretaceous)
Alaska Division of Geological & Geophysical Surveys
Kdp
DACITE PORPHYRY (Late Cretaceous)
Alaska Division of Geological & Geophysical Surveys
Ttap
ANDESITE PORPHYRY (Tertiary)
Alaska Division of Geological & Geophysical Surveys
JPza
AMPHIBOLITE (Late Paleozoic to Early Jurassic)
Alaska Division of Geological & Geophysical Surveys
Tsdp
DACITE PORPHYRY (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tsb
BASALT FLOWS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tril
INTERLAYERED UNIT (Tertiary)
Alaska Division of Geological & Geophysical Surveys
TrPs
METASEDIMENTARY ROCKS (Pennsylvanian to Triassic)
Alaska Division of Geological & Geophysical Surveys
Label
Text string to display along with symbol
Alaska Division of Geological & Geophysical Surveys
free text that is intended to display adjacent to the label point on the map
MaterialAn
Material analyzed
Alaska Division of Geological & Geophysical Surveys
free text description of the rock sample; transcribed from geologists' field notes
PlotAtScal
The scale at which the observation should be plotted
Alaska Division of Geological & Geophysical Surveys
50000
50000
LocationCo
Radius in meters of positional uncertainty envelope
Alaska Division of Geological & Geophysical Surveys
10
10
meters
Age
The interpreted (preferred) age calculated from geochronology analysis
Alaska Division of Geological & Geophysical Surveys
21.6
223
MA (million years ago)
AgePlusErr
Error associated with the age value
Alaska Division of Geological & Geophysical Surveys
0.2
4
MA (million years ago)
AgeMinusEr
Error associated with the age value
Alaska Division of Geological & Geophysical Surveys
0.2
4
Ma (million years ago)
AgeUnits
Units for numeric values in the age and age error fields.
Alaska Division of Geological & Geophysical Surveys
Ma
million years ago
Alaska Division of Geological & Geophysical Surveys
Notes
Free text for additional information about the feature.
Alaska Division of Geological & Geophysical Surveys
The notes indicate the source of the feature interpretation: "Benowitz and others, 2015", "Oswald, 2006", and "Benowitz and others, 2014"
pir2015-6-GeologicLines.shp
Dikes, coal seams, ash beds, glacial features, anticline and syncline hinge-surface traces, and other kinds of key beds that do not participate in map-unit topology
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
GeologicLines
Type
Specifies the kind of feature represented by the line
Alaska Division of Geological & Geophysical Surveys
The line features are: Syncline, Anticline, BasaltDike, IntermediateDike, Esker, and Moraine
IsConceale
This is a flag to identify contacts and faults covered by an overlying map unit.
Alaska Division of Geological & Geophysical Surveys
N
The feature IS NOT covered by an overlying map unit.
Alaska Division of Geological & Geophysical Surveys
ExistenceC
Indicates the degree of confidence and/or certainty in the interpretation of a each line segment's existence.
Alaska Division of Geological & Geophysical Surveys
Certain
Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
Alaska Division of Geological & Geophysical Surveys
IdentityCo
Indicates degree of confidence in the identification and classification of the line segment.
Alaska Division of Geological & Geophysical Surveys
Certain
Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
Alaska Division of Geological & Geophysical Surveys
LocationCo
Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available.
Alaska Division of Geological & Geophysical Surveys
50
250
meters
Symbol
References the symbol value that was assigned to the line segment.
Alaska Division of Geological & Geophysical Surveys
FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.
pir2015-6-MapUnitPolys.shp
Polygons that record the distribution of mapped or interpreted geologic units
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
MapUnitPolys
MapUnit
Short ASCII string that indicates the map unit.
Alaska Division of Geological & Geophysical Surveys
JPza
AMPHIBOLITE (Late Paleozoic to Early Jurassic)
Alaska Division of Geological & Geophysical Surveys
JPzog
ORTHOGNEISS (Late Paleozoic to Early Jurassic)
Alaska Division of Geological & Geophysical Surveys
JPzpg
PARAGNEISS (Late Paleozoic to Early Jurassic)
Alaska Division of Geological & Geophysical Surveys
Jgd
GRANODIORITE TO TONALITE (Middle Jurassic)
Alaska Division of Geological & Geophysical Surveys
KJmf
METAFLYSCH (Late Jurassic to Early Cretaceous)
Alaska Division of Geological & Geophysical Surveys
Kdp
DACITE PORPHYRY (Late Cretaceous)
Alaska Division of Geological & Geophysical Surveys
Kg
GRANITIC ROCKS (Late Cretaceous)
Alaska Division of Geological & Geophysical Surveys
Khg
HORNBLENDE GABBRO (Cretaceous)
Alaska Division of Geological & Geophysical Surveys
PPfv
FELSIC METAVOLCANIC ROCKS (Pennsylvanian to Permian)
Alaska Division of Geological & Geophysical Surveys
PPmv
MAFIC TO INTERMEDIATE METAVOLCANIC ROCKS (Pennsylvanian to Permian)
Alaska Division of Geological & Geophysical Surveys
PPva
ALTERED METAVOLCANIC ROCKS (Pennsylvanian to Permian)
Alaska Division of Geological & Geophysical Surveys
Pl
LIMESTONE AND MARBLE (Late Permian)
Alaska Division of Geological & Geophysical Surveys
Qa
UNDIFFERENTIATED FLOODPLAIN ALLUVIUM
Alaska Division of Geological & Geophysical Surveys
Qaa
ACTIVE-FLOODPLAIN ALLUVIUM
Alaska Division of Geological & Geophysical Surveys
Qaf
ALLUVIAL-FAN DEPOSITS
Alaska Division of Geological & Geophysical Surveys
Qai
INACTIVE-FLOODPLAIN ALLUVIUM
Alaska Division of Geological & Geophysical Surveys
Qc
UNDIFFERENTIATED COLLUVIUM
Alaska Division of Geological & Geophysical Surveys
Qcd
DEBRIS-FLOW DEPOSITS
Alaska Division of Geological & Geophysical Surveys
Qcf
MIXED COLLUVIUM AND ALLUVIUM
Alaska Division of Geological & Geophysical Surveys
Qcg
ROCK GLACIER DEPOSITS
Alaska Division of Geological & Geophysical Surveys
Qct
TALUS
Alaska Division of Geological & Geophysical Surveys
Qgd1
DRIFT OF EARLY WISCONSINAN AGE (75,000 TO 40,000 Y.B.P.)
Alaska Division of Geological & Geophysical Surveys
Qgd2
DRIFT OF LATE WISCONSINAN AGE, UNDIFFERENTIATED (25,000 TO 11,000 Y.B.P.)
Alaska Division of Geological & Geophysical Surveys
Qgd3
TILL AND ASSOCIATED MORAINAL DEPOSITS OF LATEST WISCONSINAN AGE (11,000 TO 9,000 Y.B.P.)
Alaska Division of Geological & Geophysical Surveys
Qgds1
ICE STAGNATION TILL OF EARLY WISCONSINAN AGE (75,000 TO 40,000 Y.B.P.)
Alaska Division of Geological & Geophysical Surveys
Qgds3
ICE STAGNATION TILL OF LATEST WISCONSINAN AGE (11,000 TO 9,000 YEARS BEFORE PRESENT [Y.B.P.])
Alaska Division of Geological & Geophysical Surveys
Qgf2
OUTWASH OF LATE WISCONSINAN AGE, UNDIFFERENTIATED
Alaska Division of Geological & Geophysical Surveys
Qgf3
OUTWASH OF LATEST WISCONSINAN AGE
Alaska Division of Geological & Geophysical Surveys
Ql
LACUSTRINE DEPOSITS
Alaska Division of Geological & Geophysical Surveys
Qld
LAKE DELTA DEPOSITS
Alaska Division of Geological & Geophysical Surveys
Qp
SWAMP DEPOSITS
Alaska Division of Geological & Geophysical Surveys
Tdb
BASALT (Tertiary)
Alaska Division of Geological & Geophysical Surveys
TrPs
METASEDIMENTARY ROCKS (Pennsylvanian to Triassic)
Alaska Division of Geological & Geophysical Surveys
Trg
GABBRO (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Trg1
GABBRO, AFFILIATED WITH UNIT Trn1 (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Trg2
GABBRO, AFFILIATED WITH UNIT Trn2 (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Tril
INTERLAYERED UNIT (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Triv
INTERMEDIATE VOLCANICLASTIC ROCKS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Trl
LIMESTONE AND MARBLE (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Trn1
NIKOLAI GREENSTONE, LOWER MEMBER (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Trn2
NIKOLAI GREENS TONE, UPPER MEMBER (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Trr1
LOWER RHYOLITE (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Trr2
UPPER RHYOLITE (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Trrp
RHYOLITE PORPHYRY (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Trsv
METASEDIMENTARY AND METAVOLCANIC ROCKS (Late Triassic)
Alaska Division of Geological & Geophysical Surveys
Tsa
ANDESITE FLOWS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tsb
BASALT FLOWS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tsd
DACITE (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tsdp
DACITE PORPHYRY (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tsr
RHYOLITE (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Tta
ANDESITE FLOWS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Ttap
ANDESITE PORPHYRY (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Ttb
BASALT FLOWS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Ttd
DACITE FLOWS (Tertiary)
Alaska Division of Geological & Geophysical Surveys
Water
polygon is a waterbody
Alaska Division of Geological & Geophysical Surveys
IdentityCo
Indicates degree of confidence in the identification and classification of the feature.
Alaska Division of Geological & Geophysical Surveys
Certain
Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
Alaska Division of Geological & Geophysical Surveys
Questionable
The interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.
Alaska Division of Geological & Geophysical Surveys
Label
The label values provide the FGDCGeoAge font characters that are required to display the geologic symbols that are appropriate to the map unit assigned in the corresponding MapUnit field.
Alaska Division of Geological & Geophysical Surveys
NULL
not applicable
Alaska Division of Geological & Geophysical Surveys
FGDCGeoAge font
Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.
Symbol
References the CMYK color value that was assigned to the map unit
Alaska Division of Geological & Geophysical Surveys
0AX0
CMYK value - C:0%, M:8%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
00X0
CMYK value - C:0%, M:0%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0A40
CMYK value - C:0%, M:8%, Y:40%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0060
CMYK value - C:0%, M:0%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0A60
CMYK value - C:0%, M:8%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0150
CMYK value - C:0%, M:13%, Y:50%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
01X0
CMYK value - C:0%, M:13%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0030
CMYK value - C:0%, M:0%, Y:30%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0020
CMYK value - C:0%, M:0%, Y:20%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0040
CMYK value - C:0%, M:0%, Y:40%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0050
CMYK value - C:0%, M:0%, Y:50%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0A50
CMYK value - C:0%, M:8%, Y:50%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0010
CMYK value - C:0%, M:0%, Y:13%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0070
CMYK value - C:0%, M:0%, Y:70%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
2XX0
CMYK value - C:20%, M:100%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
X160
CMYK value - C:100%, M:13%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
3X60
CMYK value - C:30%, M:100%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
3X40
CMYK value - C:30%, M:100%, Y:40%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
3XA0
CMYK value - C:30%, M:100%, Y:8%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
X360
CMYK value - C:100%, M:30%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
X530
CMYK value - C:100%, M:50%, Y:30%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
X440
CMYK value - C:100%, M:40%, Y:40%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0500
CMYK value - C:0%, M:50%, Y:0%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
17X0
CMYK value - C:13%, M:70%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
13X0
CMYK value - C:13%, M:30%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
62A0
CMYK value - C:60%, M:20%, Y:8%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
2000
CMYK value - C:20%, M:0%, Y:0%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
50A0
CMYK value - C:50%, M:0%, Y:8%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0550
CMYK value - C:0%, M:50%, Y:50%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
X220
CMYK value - C:100%, M:20%, Y:20%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0200
CMYK value - C:0%, M:20%, Y:0%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
1X60
CMYK value - C:13%, M:100%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
5310
CMYK value - C:50%, M:30%, Y:13%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
2X20
CMYK value - C:20%, M:100%, Y:20%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
52X0
CMYK value - C:50%, M:20%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
15X0
CMYK value - C:13%, M:50%, Y:100%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
A260
CMYK value - C:8%, M:20%, Y:60%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0450
CMYK value - C:0%, M:40%, Y:50%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
1530
CMYK value - C:13%, M:50%, Y:30%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
1330
CMYK value - C:13%, M:30%, Y:30%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
1430
CMYK value - C:13%, M:40%, Y:30%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
2540
CMYK value - C:20%, M:50%, Y:40%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
A570
CMYK value - C:8%, M:50%, Y:70%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0700
CMYK value - C:0%, M:70%, Y:0%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
4020
CMYK value - C:40%, M:0%, Y:20%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
0650
CMYK value - C:0%, M:60%, Y:50%, K:0%
CMYK values were assigned by DGGS staff based on the standards outlined in the U.S. Geological Survey, 2005, Selection of colors and patterns for geologic maps of the U.S. Geological Survey: Techniques and Methods 11-B1, 19 p.; 1 plate.
Notes
Free text for additional information about the feature.
Alaska Division of Geological & Geophysical Surveys
The notes indicate the basis of the feature interpretation: "Plug", "inferred from 7200Hz", and "Outline based on topographic relief"
pir2015-6-OrientationPoints.shp
A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.)
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
OrientationPoints
Type
The type of feature measured
Alaska Division of Geological & Geophysical Surveys
The type of feature measured: mylonitic foliation, cleavage, compaction foliation, joint surface, flow, schistosity, fault, shear band, metamorphic foliation, vein wall, bedding, fracture surface, boudinage, crenulation cleavage, dike wall, bedding with tops, dike contact, axial plane, igneous layering or foliation, bed parallel schistosity, slickenside surface, minor slip surface, gneissic layering, fold axis, slaty cleavage, outcrop trend, minor fault, igneous flow banding, major fault, bedding from photo, sill, spaced cleavage, mineral lineation, crenulation lineation, stretched mineral, slickenline, boudins, rods, intersection lineation, stretched pebble, fault trend, vein trend, hinge line, stretched clast, and striation
StationID
Identifier assigned by person who originally located station
Alaska Division of Geological & Geophysical Surveys
Generic example of a sample identifier: YYYYAAA9999X: YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.
Symbol
References the symbol value that was assigned to the line segment.
Alaska Division of Geological & Geophysical Surveys
FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.
Label
Text string to display along with symbol, usually dip and plunge values for measured orientations
Alaska Division of Geological & Geophysical Surveys
free text that is intended to display adjacent to the label point on the map
PlotAtScal
The scale at which the observation should be plotted
Alaska Division of Geological & Geophysical Surveys
0
50000
LocationCo
Radius in meters of positional uncertainty envelope
Alaska Division of Geological & Geophysical Surveys
10
250
meters
Azimuth
Strike or trend, measured in degrees clockwise from geographic North. These values use right-hand rule (dip is to right of azimuth direction).
Alaska Division of Geological & Geophysical Surveys
0
359
degrees
Inclinatio
Dip or plunge, measured in degrees down from horizontal.
Alaska Division of Geological & Geophysical Surveys
0
90
degrees
IdentityCo
Indicates degree of confidence in the identification and classification of the line segment.
Alaska Division of Geological & Geophysical Surveys
Certain
Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
Alaska Division of Geological & Geophysical Surveys
pir2015-6-Stations.shp
A point file that provides location information, observations, and other data specific to each field observation station.
Alaska Division of Geological & Geophysical Surveys and the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP), note that all field names were derived from the standard but truncated at ten characters.
Stations
FieldID
Identifier assigned by person who originally located station.
Alaska Division of Geological & Geophysical Surveys
Generic example of a sample identifier: YYYYAAA9999X: YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.
LocationCo
Radius in meters of positional uncertainty envelope
Alaska Division of Geological & Geophysical Surveys
10
10
meters
LocationMe
Term that categorizes technique used to determine station location.
Alaska Division of Geological & Geophysical Surveys
handheld GPS
Location data were collected using an unspecified model of Global Positioning System (GPS) receiver.
Alaska Division of Geological & Geophysical Surveys
TimeDate
Time and date of observation at the station
Alaska Division of Geological & Geophysical Surveys
6/25/2014
8/3/2014
Calendar Date
Observer
Name of the person who located station
Alaska Division of Geological & Geophysical Surveys
Field investigators were: Freeman, Lawrence K., Lande, Lauren, Newberry, R.J, Reioux, David A., Sicard, Karri R., Twelker, Evan and Wypych, Alicja
Notes
Additional information about the station
Alaska Division of Geological & Geophysical Surveys
Free text description. Note: the value may be truncated if the description exceeds 255 characters
Alaska Division of Geological & Geophysical Surveys
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
(907)451-5050
dggspubs@alaska.gov
8 am to 4:30 pm, Monday through Friday, except State holidays
Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
PIR 2015-6
The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.
Contact DGGS for current pricing
Shapefiles
http://dx.doi.org/10.14509/29470
Free download
20150914
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.
http://www.dggs.alaska.gov/metadata/dggs.ext
dggs metadata extensions