CorrelationOfMapUnits: Geodatabase feature dataset that depicts the map unit correlation chart; includes applicable unit designators, brackets, dividing lines, and text, NCGMP09 format ContactsAndFaults: Line features that depict faults and geologic contacts. GenericSamples: A point file that provides locations, symbology, and labels for geologic samples. 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. IsoValueLines: Topographic contours. MapUnitPolys: Polygons that record the distribution of mapped or interpreted geologic units. OtherPolys: Polygons that record the location and extent of geologic or geographic features other than the geologic units.
Nye, C.J., Scott, W.E., Neill, O.K., Waythomas, C.F., Cameron, C.E., and Calvert, A.T., 2017, Geology of Kasatochi volcano, Aleutian Islands, Alaska: Professional Report PR 123, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This is a vector data set.
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 World Geodetic System of 1984.
The ellipsoid used is WGS 84.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257223563000025.
Feature type(s): contact; shoreline; coastline
Value | Definition |
---|---|
N | The feature IS NOT covered by an overlying map unit. |
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. |
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. |
Range of values | |
---|---|
Minimum: | 1 |
Maximum: | 10 |
Units: | meters |
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. |
The notes indicate the source of the feature interpretation or provide more information about the feature.
Feature type(s): LAVA; gabbro; na; basalt, gabbro gms; basalt sheath, peridotite; per-ite; pyx-ite; anorthosite; gab_plag; gab_amph
Value | Definition |
---|---|
NULL | Blank (NULL) field values indicate that a map unit value was not assigned. |
Q8f | 2008 pyroclastic fans - Thick fans that were formed by deposits of 2008 lithic pyroclastic density currents and falls that were channelized by local topography |
Q8p | Volcanic rocks |
Qb | Beach deposits - Sand and gravel beach deposits |
Qd | 2008 mass-flow deposits - Deposits of mud-lump debris flows derived from sloughed upper portions of 2008 pyroclastic deposits immediately after the eruption |
Qf | Alluvial fan deposits - Sand, gravel, cobbles, and boulders derived mostly from 2008 eruption deposits deposited by streams and debris flows |
Ql | Lag beach deposits - Boulder and cobble lag beach deposits |
Qlp | Luna pyroclastic deposits - Lithic basaltic andesite to andesite pyroclastic density current deposits |
Qobm | Ogres Brow basaltic andesite - A single thick porphyritic basaltic andesite flow lobe |
Qpg | Peregrine glaciovolcanic deposits - Unbedded autobrecciated lava in the lower part and juvenile clast-bearing laharic debris flows in the upper part |
Qrb | Rye basalt - Porphyritic basalt flows |
Qrm | Rye basaltic andesite - Porphyritic basaltic andesite flow or flows |
Qt | Talus - Accumulations of angular boulders deposited below cliffs |
Qtm | Tundering basaltic andesite - Thick flow lobes of porphyritic basaltic andesite |
Qwa | Whiskey andesite - Porphyritic andesitic flows or flow lobes |
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. |
Value | Definition |
---|---|
NULL | A sample number was not recorded or was not assigned. |
Generic example of a DGGS sample identifier: YYYYAAA9999XXXX; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, XXXX= optional alpha characters which indicate that multiple samples were collected at a given location or that multiple observations with possibly identical prefixes were recorded in the project database. Field stations observed by non-DGGS personnel use identifiers from the originating reference.
Material type(s): whole-rock; not analyzed
Range of values | |
---|---|
Minimum: | 1 |
Maximum: | 1 |
Units: | meters |
The notes indicate the source of the feature interpretation or provide more information about the feature.
Value | Definition |
---|---|
Q8f | 2008 pyroclastic fans - Thick fans that were formed by deposits of 2008 lithic pyroclastic density currents and falls that were channelized by local topography |
Q8p | Volcanic rocks |
Qrb | Rye basalt - Porphyritic basalt flows |
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. |
Value | Definition |
---|---|
NULL | A sample number was not recorded or was not assigned. |
Generic example of a DGGS sample identifier: YYYYAAA9999XXXX; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, XXXX= optional alpha characters which indicate that multiple samples were collected at a given location or that multiple observations with possibly identical prefixes were recorded in the project database. Field stations observed by non-DGGS personnel use identifiers from the originating reference.
Material type(s): groundmass
Range of values | |
---|---|
Minimum: | 1 |
Maximum: | 1 |
Units: | meters |
Range of values | |
---|---|
Minimum: | 4 |
Maximum: | 131 |
Range of values | |
---|---|
Minimum: | 2 |
Maximum: | 3 |
Range of values | |
---|---|
Minimum: | 2 |
Maximum: | 3 |
Units(s): ka
The notes indicate the source of the feature interpretation or provide more information about the feature.
Feature type(s): crater rim; shoreline; beach bluffs; tension cracks; lgl shore; lgl max extent; gullies 1-5m wide; gullies > 5m wide
Value | Definition |
---|---|
N | The feature IS NOT covered by an overlying map unit. |
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. |
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. |
Range of values | |
---|---|
Minimum: | 1 |
Maximum: | 1 |
Units: | meters |
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. |
The notes indicate the source of the feature interpretation or provide more information about the feature.
Feature type(s): index contour; contour
Range of values | |
---|---|
Minimum: | -10 |
Maximum: | 310 |
Range of values | |
---|---|
Minimum: | 1 |
Maximum: | 1 |
Units: | meters |
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. |
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. |
The notes indicate the source of the feature interpretation or provide more information about the feature.
Value | Definition |
---|---|
NULL | Blank (NULL) field values indicate that a map unit value was not assigned. |
Q8f | 2008 pyroclastic fans - Thick fans that were formed by deposits of 2008 lithic pyroclastic density currents and falls that were channelized by local topography |
Q8p | Volcanic rocks |
Qb | Beach deposits - Sand and gravel beach deposits |
Qd | 2008 mass-flow deposits - Deposits of mud-lump debris flows derived from sloughed upper portions of 2008 pyroclastic deposits immediately after the eruption |
Qf | Alluvial fan deposits - Sand, gravel, cobbles, and boulders derived mostly from 2008 eruption deposits deposited by streams and debris flows |
Qgmb | Gregs Mighty basalt - Thin porphyritic olivine- clinopyroxene-basalt flows |
Ql | Lag beach deposits - Boulder and cobble lag beach deposits |
Qlp | Luna pyroclastic deposits - Lithic basaltic andesite to andesite pyroclastic density current deposits |
Qm | Back-beach deposits - Muddy silt, sand, and subordinate gravel deposited behind beach ridges |
Qmfm | Monkeys Forehead basaltic andesite - Porphyritic basaltic andesite flows and flow lobes |
Qmka | Mount Kasatochi andesite - Amphibole-bearing porphyritic andesite dome or coulee |
Qobm | Ogres Brow basaltic andesite - A single thick porphyritic basaltic andesite flow lobe |
Qpg | Peregrine glaciovolcanic deposits - Unbedded autobrecciated lava in the lower part and juvenile clast-bearing laharic debris flows in the upper part |
Qpl | Peregrine lava - Massive amphibole-rich porphyritic basaltic andesite lava |
Qrb | Rye basalt - Porphyritic basalt flows |
Qrm | Rye basaltic andesite - Porphyritic basaltic andesite flow or flows |
Qs | Slump deposits - Collapsed bluffs of 2008 eruption deposits |
Qt | Talus - Accumulations of angular boulders deposited below cliffs |
Qtm | Tundering basaltic andesite - Thick flow lobes of porphyritic basaltic andesite |
Qw8 | 2008 pyroclastic deposits - 2008 pyroclastic deposits on crater wall surfaces with moderate slope |
Qwa | Whiskey andesite - Porphyritic andesitic flows or flow lobes |
Qwc | Colluvium - Colluvium; dominantly post-2008 eruption |
Qwd | Dikes |
Qwf | Fragmental volcanic deposits - Dominantly red, orange, and gray scoriaceous breccia and coarse tephra |
Qwh | Lower crater wall deposits - Greenish-weathering bedded and massive volcaniclastic and |
Qwl | Lava - Dominantly lava flows |
Qwp | Thin tephra - Thinly bedded tephra-fall or fine-grained pyroclastic Qwp flow and surge deposits |
Qwtf | Thin lava flows - Thin lava flows; morphologically unique in crater wall exposures; likely correlative with Gregs Mighty basalt |
water | water |
Value | Definition |
---|---|
NULL | Blank (NULL) field values indicate that a degree of confidence value was not assigned. |
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. |
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. |
Value | Definition |
---|---|
4430 | CMYK value - C:40%, M:40%, Y:30%, K:0% |
3460 | CMYK value - C:30%, M:40%, Y:60%, K:0% |
0060 | CMYK value - C:0%, M:0%, Y:60%, K:0% |
0140 | CMYK value - C:0%, M:13%, Y:40%, K:0% |
0400 | CMYK value - C:0%, M:40%, Y:0%, K:0% |
0A00 | CMYK value - C:0%, M:8%, Y:0%, K:0% |
AAA0 | CMYK value - C:8%, M:8%, Y:8%, K:0% |
2000 | CMYK value - C:20%, M:0%, Y:0%, K:0% |
A000, pattern 402 | CMYK value - C:8%, M:0%, Y:0%, K:0% |
A000 | CMYK value - C:8%, M:0%, Y:0%, K:0% |
0A20 | CMYK value - C:0%, M:8%, Y:20%, K:0% |
0200 | CMYK value - C:0%, M:20%, Y:0%, K:0% |
0030 | CMYK value - C:0%, M:0%, Y:30%, K:0% |
0531 | CMYK value - C:0%, M:50%, Y:30%, K:13% |
1240 | CMYK value - C:13%, M:20%, Y:40%, K:0% |
3050 | CMYK value - C:30%, M:0%, Y:50%, K:0% |
05X0 | CMYK value - C:0%, M:50%, Y:100%, K:0% |
A100 | CMYK value - C:8%, M:13%, Y:0%, K:0% |
A010 | CMYK value - C:8%, M:0%, Y:13%, K:0% |
5600 | CMYK value - C:50%, M:60%, Y:0%, K:0% |
3400 | CMYK value - C:30%, M:40%, Y:0%, K:0% |
7600 | CMYK value - C:70%, M:60%, Y:0%, K:0% |
3200 | CMYK value - C:30%, M:20%, Y:0%, K:0% |
5000 | CMYK value - C:50%, M:0%, Y:0%, K:0% |
1A00 | CMYK value - C:13%, M:8%, Y:0%, K:0% |
3000 | CMYK value - C:30%, M:0%, Y:0%, K:0% |
5400 | CMYK value - C:50%, M:40%, Y:0%, K:0% |
5070 | CMYK value - C:50%, M:0%, Y:70%, K:0% |
1000 | CMYK value - C:13%, M:0%, Y:0%, K:0% |
3010 | CMYK value - C:30%, M:0%, Y:13%, K:0% |
The notes indicate the source of the feature interpretation or provide more information about the feature.
Feature type(s): geologic unit pattern; map area boundary
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. |
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. |
The notes indicate the source of the feature interpretation or provide more information about the feature.
Initial fieldwork was supported by the North Pacific Research Board (Project #923), the U.S. Fish and Wildlife Service, the Alaska Volcano Observatory, and the U.S. Geological Survey. Additional fieldwork was supported by AVO and the USFWS. We thank USFWS for continued encouragement and support. We especially thank Jeff Williams of the USFWS for sharing his deep knowledge of Kasatochi history, biology, and geography, and for his all-encompassing interest in Kasatochi science. Fieldwork was supported by the M/V Tiglax, under the able command of Captain Billy Pepper; we thank the captain and crew for comfortable and safe transport. We thank pilots Burke Mees, Jerry Morris, and Roger Clifford for taking and sharing oblique aerial photographs. Post-eruption scientific studies span a large range of biologic and geologic disciplines, and we thank the other scientists for rewarding and fruitful cross-fertilization. Chris Nye thanks Patricia Gallagher for help with ArcGIS during preparation of the map draft and for final cartography, and Nicole Kinsman for help with establishing the Kasatochi Mean Sea Level datum. Reviews by Brian Jicha and especially Michael Clynne substantially improved the report. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the State of Alaska or U.S. Government.
(907)451-5039 (voice)
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dggspubs@alaska.gov
Kasatochi is a small, isolated island volcano in the center of the Aleutian Island chain. It consists of a roughly circular cone approximately 3 km in diameter with a lake-filled central crater that is 1.2 km in diameter and extends from the highest point on the island to sea level. A large eruption in 2008 blanketed the island in pyroclastic deposits. A multidisciplinary effort to document recovery of the ecosystem was initiated, and this study of the geology of the island was undertaken as part of that effort. This 1:5000 scale geologic map and accompanying report is the first to document the geology of the entire island and it presents a snapshot of the island early in its response to the 2008 eruption. Map units are the result of combined field observations, aerial imagery interpretation, geochemical and geochronological analysis.
Nye, Chris, 2017, Kasatochi Island 2009 topography: Miscellaneous Publication MP 163, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Certainty in attribute interpretation varies throughout the map. Attribute 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.
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.
This DGGS Professional Report is a final report of scientific research. It has received technical review and may be cited as an agency publication. This publication provides information about the mapped and interpreted geologic deposits distinguishable at a scale of about 1:5,000. The reader is cautioned that unevaluated hazards may be present in areas that were inecessable to field geologists.
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.
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.
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PR 123
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.
Data format: | shapefiles and geodatabase |
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Network links: |
<http://doi.org/10.14509/29718> |
(907)451-5039 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov