E1_full_resolution_panoramas: Full resolution versions of panoramic photographs in appendix 1. E3_sample_metadata: Sample locations and descriptions. E5_whole_rock_compositions: Major and trace element analyses of rocks and mineral separates. E6_modal_data: Point count data for phenocrysts and groundmass. E7_photomicrographs: Full resolution versions of photomicrographs in appendix 7. E8_microprobe_data: Electron microprobe analyses of minerals. E9_componentry_08j: Grain size distribution of 2008 pyroclastic deposits.
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 point data set.
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees.
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.
Initial fieldwork was supported by the North Pacific Research Board (Project number: 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.
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Kasatochi volcano is located at the intersection of the flat, shallow Aleutian platform and the Bering slope rise, an area of high biologic productivity. As a result, the island hosts a large sea lion colony and nesting sites for hundreds of thousands of seabirds. A large eruption in 2008 blanketed the island in pyroclastic deposits, covering nesting sites and almost all existing vegetation. 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 study is the first to document the geology of the entire island, and presents a snapshot of the island early in its response to the 2008 eruption.
Nye, Chris, 2017, Kasatochi Island 2009 topography: Miscellaneous Publication MP 163, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This DGGS Professional Report is a final report of scientific research. Several scientists familiar with the subject matter provided technical reviews. Uncertainties associated with the depiction or interpretation of various features are discussed in the manuscript.
Locations were recorded using handheld GPS devices. Location errors reported by the GPS were not recorded.
This data release is complete.
not applicable
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PR 123
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| Data format: | digital data |
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| Network links: |
<http://doi.org/10.14509/29718> |
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