Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
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• How was the data set created?
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  1. How well have the observations been checked?
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• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Twelker, Evan, Athey, J.E., Newberry, R.J., Griesel, G.A., Szumigala, D.J., Freeman, L.K., Elliott, B.A., Werdon, M.B., and Stevens, D.S.P., 2016, Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska: Report of Investigation RI 2016-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/29665>

   Other_Citation_Details: 39 p., 1 sheet, scale 1:63,360.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -149.016142

   East_Bounding_Coordinate: -148.214073

   North_Bounding_Coordinate: 65.630106

   South_Bounding_Coordinate: 65.322677

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 2001

   Ending_Date: 2016

   Currentness_Reference: ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: report and digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a vector data set.

   2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator

      Universal_Transverse_Mercator:

      UTM_Zone_Number: 6

      Transverse_Mercator:

      Scale_Factor_at_Central_Meridian: 0.999600

      Longitude_of_Central_Meridian: -147

      Latitude_of_Projection_Origin: 0

      False_Easting: 500000.000000

      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest .00000001
      Ordinates (y-coordinates) are specified to the nearest .00000001
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.
      

7. How does the data set describe geographic features?

   border

   A polygon that encompasses the maximum geographic extent of the data observations. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   CorrelationOfMapUnits

   Geodatabase feature dataset that depicts the map unit correlation chart; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   CrossSectionA, CrossSectionB, CrossSectionC, CrossSectionD

   Geodatabase feature datasets of geologic cross sections; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   CartographicLines, CartographicLinesAnno

   Cross section transects, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   ContactsAndFaults, ContactsAndFaultsAnno, ContactsAndFaultsEndAnno

   Line features and annotation depicting faults and geologic contacts, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   Type

   Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

   Feature type(s): contact, surficial

   IsConcealed

   This is a flag to identify contacts and faults covered by overlying map units. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   Y	The feature IS covered by an overlying map unit.
   N	The feature IS NOT covered by an overlying map unit.

   ExistenceConfidence

   Indicates the degree of confidence and/or certainty in the interpretation of a a feature's existence. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   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.
   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.

   IdentityConfidence

   Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   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.
   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.

   LocationConfidenceMeters

   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. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   Symbol

   References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
   Codeset Source:	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

   The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDCGeoAge font
   Codeset Source:	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.

   Notes

   Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

   The notes indicate the source of the feature interpretation or provide more information about the feature.

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   CoveredUnitLabelsAnno

   Annotation labels for covered map units. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   DataSourcePolys

   Polygons that delineate the data sources for various parts of the map, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   DikePoints

   Dike location points, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   Type

   Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

   Feature type(s): dike contact and dike

   StationID

   Identifier assigned by person who originally located station (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	A station number was not recorded or was not assigned.

   Generic example of a DGGS station 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. Stations observed by non-DGGS personnel use identifiers from the originating reference.

   MapUnit

   Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Blank (NULL) field values indicate that a map unit value was not assigned.
   Ki	Felsic to intermediate dikes and sills
   Kmk	Money Knob intrusive suite
   Ksc	Shorty Creek intrusive suite

   Symbol

   References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
   Codeset Source:	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.

   PlotAtScale

   The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	50000

   Azimuth

   Strike or trend, measured in degrees clockwise from geographic North, using right-hand rule (dip is to right of azimuth direction). Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	340
   Units:	degrees

   Inclination

   Dip or plunge, measured in degrees down from horizontal. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	80
   Units:	degrees

   IdentityConfidence

   Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   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.

   OrientationConfidenceDegrees

   Estimated circular error, in degrees. For planar features, error in orientation of pole to plane. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	5
   Units:	degrees

   Notes

   Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

   The notes indicate the source of the feature interpretation or provide more information about the feature.

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   FossilPoints, FossilPointsAnno

   Fossil location points, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   Type

   Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

   Feature type(s): Radiolarians

   MapUnit

   Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   Cwl	Wickersham limestone
   Dc	Cascaden Ridge sandstone, shale, and conglomerate
   Old	Livengood Dome chert
   Sl	Lost Creek limestone
   lPzZd	Amy Creek dolostone, siliceous dolostone, and limestone
   lPzZmc	Amy Creek siliceous mudstone and chert

   Symbol

   References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
   Codeset Source:	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

   The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDCGeoAge font
   Codeset Source:	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.

   FieldSampleID

   Identifier assigned by person who originally located the sample (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	A sample number was not recorded or was not assigned.

   Generic example of a DGGS 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. Stations observed by non-DGGS personnel use identifiers from the originating reference.

   PlotAtScale

   The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	50000
   Maximum:	50000

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   GeochronPoints, GeochronPointsAnno

   Geochronology sample location points, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   Type

   Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

   Feature type(s): U-Pb

   MapUnit

   Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   Cgs	Greenstone
   Cmg	Metagabbro
   Kmk	Money Knob intrusive suite
   Ksc	Shorty Creek intrusive suite
   lPzZmb	Amy Creek metabasalt
   lPzZmc	Amy Creek siliceous mudstone and chert

   Symbol

   References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
   Codeset Source:	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

   The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDCGeoAge font
   Codeset Source:	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.

   FieldSampleID

   Identifier assigned by person who originally located the sample (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	A sample number was not recorded or was not assigned.

   Generic example of a DGGS 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. Stations observed by non-DGGS personnel use identifiers from the originating reference.

   MaterialAnalyzed

   Type of material used for analysis. (Source: Alaska Division of Geological & Geophysical Surveys)

   Material type(s): zircon

   PlotAtScale

   The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	50000
   Maximum:	50000

   Age

   The interpreted (preferred) age calculated from geochronological analysis. Note: units provided in AgeUnits field. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	57
   Maximum:	566

   AgePlusError

   The upper age error calculated from geochronological analysis. Note: units provided in AgeUnits field. (Source: Alaska Division of Geological & Geophysical Surveys or originating reference)

   Range of values
   Minimum:	0
   Maximum:	16

   AgeMinusError

   The lower age error calculated from geochronological analysis. Note: units provided in AgeUnits field. (Source: Alaska Division of Geological & Geophysical Surveys or originating reference)

   Range of values
   Minimum:	0
   Maximum:	16

   AgeUnits

   Units of the geochronology analysis. (Source: Alaska Division of Geological & Geophysical Surveys or originating reference)

   Units(s): Ma

   Notes

   Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

   The notes indicate the source of the feature interpretation or provide more information about the feature.

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   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, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   Type

   Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

   Feature type(s): overturned antiform

   IsConcealed

   This is a flag to identify contacts and faults covered by overlying map units. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   Y	The feature IS covered by an overlying map unit.

   ExistenceConfidence

   Indicates the degree of confidence and/or certainty in the interpretation of a a feature's existence. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   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.
   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.

   IdentityConfidence

   Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   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.
   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.

   Symbol

   References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
   Codeset Source:	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.

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   MapUnitPolys, MapUnitPolysAnno

   Polygons and associated annotations that record the distribution of mapped or interpreted geologic units, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS)This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   MapUnit

   Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   CZwa	Wickersham shale
   Cgs	Greenstone
   Cmg	Metagabbro
   Cmks	Mudstone and chert
   Cs	Serpentinite, metagabbro, and greenstone
   Cwl	Wickersham limestone
   Dc	Cascaden Ridge sandstone, shale, and conglomerate
   Dcl	Cascaden Ridge shale to fine sandstone
   Dcu	Cascaden Ridge sandstone, siltstone, and conglomerate
   Dcv	Cascaden Ridge peralkaline rhyolite flows, breccia, and lithic tuff
   Di	Olive Creek pluton
   Kcrp	Cascaden Ridge pluton
   Ki	Felsic to intermediate dikes and sills
   Kmk	Money Knob intrusive suite
   Ksc	Shorty Creek intrusive suite
   Kwcc	Wilber Creek conglomerate
   Kwcf	Wilber Creek flysch
   Kwcs	Wilber Creek shale and siltstone
   Old	Livengood Dome chert
   PDs	Shale
   QTfb	Bench alluvium
   Qa	Undifferentiated alluvium
   Qaf	Alluvial fan deposits
   Qat	Terrace alluvium
   Qcf	Mixed colluvium and alluvium
   Qcl	Landslide deposits
   Qer	Retransported silt and lowland loess
   Qh	Placer tailings and artificial fills
   Qs	Swamp deposit
   Qsu	Upland silt and colluvium
   Sl	Lost Creek limestone
   Ss	Lost Creek sandstone, siltstone, shale, and conglomerate
   TrDs	Sandstone, shale, and chert
   Trg	Rampart gabbro, quartz gabbro, and minor chert
   lPzZd	Amy Creek dolostone, siliceous dolostone, and limestone
   lPzZmb	Amy Creek metabasalt
   lPzZmc	Amy Creek siliceous mudstone and chert

   IdentityConfidence

   Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   unspecified	The author has not specified a level of confidence or certainty in the interpretation of the feature.

   Label

   The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

   Formal codeset
   Codeset Name:	FGDCGeoAge font
   Codeset Source:	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. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   2260	CMYK value - C:20%, M:20%, Y:60%, K:0%
   1240	CMYK value - C:13%, M:20%, Y:40%, K:0%
   0030	CMYK value - C:0%, M:0%, Y:30%, K:0%
   0050	CMYK value - C:0%, M:0%, Y:50%, K:0%
   0070	CMYK value - C:0%, M:0%, Y:70%, K:0%
   0A40	CMYK value - C:0%, M:8%, Y:40%, K:0%
   0260	CMYK value - C:0%, M:20%, Y:60%, K:0%
   2350	CMYK value - C:20%, M:30%, Y:50%, K:0%
   0A70	CMYK value - C:0%, M:8%, Y:70%, K:0%
   4450	CMYK value - C:40%, M:40%, Y:50%, K:0%
   5370	CMYK value - C:50%, M:30%, Y:70%, K:0%
   2040	CMYK value - C:20%, M:0%, Y:40%, K:0%
   1X00	CMYK value - C:13%, M:100%, Y:0%, K:0%
   3A60	CMYK value - C:30%, M:8%, Y:60%, K:0%
   07X0	CMYK value - C:0%, M:70%, Y:100%, K:0%
   5530	CMYK value - C:50%, M:50%, Y:30%, K:0%
   4310	CMYK value - C:40%, M:30%, Y:13%, K:0%
   2430	CMYK value - C:20%, M:40%, Y:30%, K:0%
   2640	CMYK value - C:20%, M:60%, Y:40%, K:0%
   A700	CMYK value - C:8%, M:70%, Y:0%, K:0%
   4710	CMYK value - C:40%, M:70%, Y:13%, K:0%
   3750	CMYK value - C:30%, M:70%, Y:50%, K:0%
   6X20	CMYK value - C:60%, M:100%, Y:20%, K:0%
   45A0	CMYK value - C:40%, M:50%, Y:8%, K:0%
   32A0	CMYK value - C:30%, M:20%, Y:8%, K:0%
   12A0	CMYK value - C:13%, M:20%, Y:8%, K:0%
   3XX0	CMYK value - C:30%, M:100%, Y:100%, K:0%
   3430	CMYK value - C:30%, M:40%, Y:30%, K:0%
   6420	CMYK value - C:60%, M:40%, Y:20%, K:0%
   0110	CMYK value - C:0%, M:13%, Y:13%, K:0%
   2400	CMYK value - C:20%, M:40%, Y:0%, K:0%
   4600	CMYK value - C:40%, M:60%, Y:0%, K:0%
   1570	CMYK value - C:13%, M:50%, Y:70%, K:0%
   A770	CMYK value - C:8%, M:70%, Y:70%, K:0%
   4A00	CMYK value - C:40%, M:8%, Y:0%, K:0%
   3010	CMYK value - C:30%, M:0%, Y:13%, K:0%
   6A30	CMYK value - C:60%, M:8%, Y:30%, K:0%

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   OrientationPoints, OrientationPointsAnno

   A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.), NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS)This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   Type

   Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

   Feature type(s): axial plane

   StationID

   Identifier assigned by person who originally located station (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	A station number was not recorded or was not assigned.

   Generic example of a DGGS station 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. Stations observed by non-DGGS personnel use identifiers from the originating reference.

   Symbol

   References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	not applicable

   Formal codeset
   Codeset Name:	FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
   Codeset Source:	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.

   PlotAtScale

   The scale at which the observation should be plotted. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	50000

   Azimuth

   Strike or trend, measured in degrees clockwise from geographic North, using right-hand rule (dip is to right of azimuth direction). Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	358
   Units:	degrees

   Inclination

   Dip or plunge, measured in degrees down from horizontal. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	0
   Maximum:	90
   Units:	degrees

   IdentityConfidence

   Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   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.

   OrientationConfidenceDegrees

   Estimated circular error, in degrees. For planar features, error in orientation of pole to plane. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	5
   Maximum:	5
   Units:	degrees

   RuleID

   References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

   Data type = integer

   Stations

   A point file that provides location information, observations, and other data specific to each field observation station, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

   FieldID

   Identifier assigned by person who originally located station (Source: 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. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Blank (NULL) field values indicate that a map unit value was not assigned.
   Cmg	Metagabbro
   Cmks	Mudstone and chert
   Cs	Serpentinite, metagabbro, and greenstone
   Dcl	Cascaden Ridge shale to fine sandstone
   Dcu	Cascaden Ridge sandstone, siltstone, and conglomerate
   Dcv	Cascaden Ridge peralkaline rhyolite flows, breccia, and lithic tuff
   Old	Livengood Dome chert
   lPzZd	Amy Creek dolostone, siliceous dolostone, and limestone
   lPzZmb	Amy Creek metabasalt
   lPzZmc	Amy Creek siliceous mudstone and chert

   LocationConfidenceMeters

   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. (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	10
   Maximum:	10
   Units:	meters

   LocationMethod

   Term that categorizes technique used to determine station location (Source: Alaska Division of Geological & Geophysical Surveys)

   Location method(s): Handheld GPS and Unknown

   Observer

   Name of the person who located station (Source: Alaska Division of Geological & Geophysical Surveys)

   Observer(s): ITH drillhole

   Notes

   Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

   The notes indicate the source of the feature interpretation or provide more information about the feature.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Twelker, Evan
   • Athey, J.E.
   • Newberry, R.J.
   • Griesel, G.A.
   • Szumigala, D.J.
   • Freeman, L.K.
   • Elliott, B.A.
   • Werdon, M.B.
   • Stevens, D.S.P.

2. Who also contributed to the data set?

   This project is part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). Partial funding for the 2003 geologic mapping was also provided by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under STATEMAP award number 03HQAG0055. The accompanying report provides additional acknowledgements to a multitude of people for their various contributions to this map.

3. To whom should users address questions about the data?
   Alaska Division of Geological & Geophysical Surveys
   GIS Manager
   3354 College Rd
   Fairbanks, AK 99709-3707
   USA
   

   907-451-5020 (voice)
   dggsgis@alaska.gov
   

   Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Why was the data set created?

This geologic map and report depicts portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles. This report synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. It expands and updates the Alaska Division of Geological & Geophysical Surveys (DGGS) Preliminary Interpretive Report (PIR) 2004-3 with the addition of new DGGS mapping and drillhole data from ITH, and integrates previously published DGGS surficial geology from Report of Investigation (RI) 84-6, and RI 2013-2.

How was the data set created?

1. From what previous works were the data drawn?

   Albanese, M.D., 1983 (source 1 of 6)

   Albanese, M.D., 1983, Bedrock geologic map of the Livengood B-4 Quadrangle, east-central Alaska: Report of Investigation RI 83-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/2342>

   Other_Citation_Details: 1 sheet, scale 1:40,000

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 40000

   Source_Contribution: Bedrock geologic unit interpretation

   Athey, J.E. and Craw, P.A., 2004 (source 2 of 6)

   Athey, J.E., and Craw, P.A., 2004, Geologic maps of the Livengood SW C-3 and SE C-4 quadrangles, Tolovana mining district, Alaska: Preliminary Interpretive Report PIR 2004-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/3308>

   Other_Citation_Details: 24 p

   Type_of_Source_Media: paper

   Source_Contribution: Bedrock geologic unit interpretation

   Bundtzen, T.K., 1983 (source 3 of 6)

   Bundtzen, T.K., 1983, Bedrock geologic outcrop map of the Livengood B-3 Quadrangle, Alaska: Report of Investigation RI 83-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/2345>

   Other_Citation_Details: 1 sheet, scale 1:40,000

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 40000

   Source_Contribution: Bedrock geologic unit interpretation

   Burns, L.E. and others, 2015 (source 4 of 6)

   Burns, L.E., Geoterrex-Dighem, Stevens Exploration Management Corp., Emond, A.M., and Graham, G.R.C., 2015, Livengood mining district electromagnetic and magnetic airborne geophysical survey, data compilation: Geophysical Report GPR 2015-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/29412>

   Type_of_Source_Media: digital data

   Source_Contribution: Bedrock geologic unit interpretation

   Robinson, M.S., 1983 (source 5 of 6)

   Robinson, M.S., 1983, Bedrock geologic map of the Livengood C-4 Quadrangle, east-central Alaska: Report of Investigation RI 83-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/2343>

   Other_Citation_Details: 1 sheet, scale 1:40,000

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 40000

   Source_Contribution: Bedrock geologic unit interpretation

   Smith, T.E., 1983 (source 6 of 6)

   Smith, T.E., 1983, Bedrock geologic map of the Livengood C-3 Quadrangle, east-central Alaska: Report of Investigation RI 83-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/2344>

   Other_Citation_Details: 1 sheet, scale 1:40,000

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 40000

   Source_Contribution: Bedrock geologic unit interpretation

2. How were the data generated, processed, and modified?

   Date: 2010 (process 1 of 4)

   Bedrock geologic unit interpretation - This geologic map and report draws on work completed by DGGS in 1982, 2003, and 2010, as well as work by ITH. DGGS mapping in 2003 focused on the Livengood southeast C-4 and southwest C-3 quadrangles and was published as PIR 2004-3 and RI 2013-2. The 2003 project included approximately 90 person-days of fieldwork, and the 2010 DGGS program consisted of approximately 100 person-days of bedrock geologic mapping fieldwork spent mainly in the north half of the Livengood B-4 and the northwest B-3 quadrangles. Together, the 2003 and 2010 programs combine for 2,444 handheld-GPS-located geologic mapping stations. Outcrop map data from the 1982 DGGS field projects (Albanese, 1983 [RI 83-3]; Robinson, 1983 [RI 83-4]; Smith, 1983 [RI 83-5]; Bundtzen, 1983 [RI 83-6]) were also incorporated in field planning and final geologic interpretation. Mapping was supplemented with geochemistry, airborne geophysical survey data, radiometric and fossil dates, and magnetic susceptibility measurements.

   Data sources used in this process:

   • Albanese, M.D., 1983
   • Athey, J.E. and Craw, P.A., 2004
   • Bundtzen, T.K., 1983
   • Burns, L.E. and others, 2015
   • Robinson, M.S., 1983
   • Smith, T.E., 1983

   Date: 2015 (process 2 of 4)

   Surficial geologic unit interpretation - Surficial deposits in Livengood C-3 and C-4 quadrangles were mapped by interpreting 1:63,360-scale, false-color infrared aerial photographs taken in August 1978 and August 1986, and verified during five days of field checking in 2003 and two days in 2011. Tailings were mapped in the western Livengood Creek area using 1:6,000-scale aerial photographs taken in 2001. Preliminary mapping was carried out by Patty Burns and subsequently revised and finalized by Richard Reger.

   Date: 2015 (process 3 of 4)

   GIS analysis and digital cartography - The geologic and geographic features portrayed in this data distribution package were attributed according to the NCGMP09 geodatabase standard.

   Date: 2016 (process 4 of 4)

   Technical review - This DGGS Report of Investigations is a final report of scientific research. It has received technical review and editing by several scientists familiar with the subject matter. We incorporated the reviewers' suggestions into the final draft when deemed appropriate.

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

   Certainty in attribute interpretation varies throughout the map. Data fields within each table record the author's degree of confidence in the existence or identity of applicable features. This publication is a final report of research and has received two technical reviews as well as technical editing.

2. How accurate are the geographic locations?

   Certainty in feature boundaries or location varies throughout the map. Data fields within each table record the author's degree of confidence in the location of applicable features.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   This data release is complete.

5. How consistent are the relationships among the observations, including topology?

   Polygon topology is present and clean on the original geospatial dataset. All polygon features were topologically validated using ArcGIS prior to export to shapefile format.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:

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).

Use_Constraints:

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.

1. Who distributes the data set? (Distributor 1 of 1)
   Alaska Division of Geological & Geophysical Surveys
   3354 College Road
   Fairbanks, AK 99709-3707
   USA
   

   (907)451-5020 (voice)
   (907)451-5050 (FAX)
   dggspubs@alaska.gov
   

   Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

   Contact_Instructions:

   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.

2. What's the catalog number I need to order this data set?

   RI 2016-5

3. What legal disclaimers am I supposed to read?

   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.

4. How can I download or order the data?
   • Availability in non-digital form:

     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.

   • Cost to order the data: Contact DGGS for current pricing

   • Availability in digital form:

     Data format:	ESRI ArcGIS .mxd file, geodatabase, and shapefiles
     Network links:	<http://dx.doi.org/10.14509/29665>

   • Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 30-Nov-2016

Metadata author:

Alaska Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)

Metadata standard:

FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

• <http://www.dggs.alaska.gov/metadata/dggs.ext>