{"action":"create","ckan_id":null,"date_created":"Wed, 08 Apr 2026 06:49:54 GMT","date_finished":null,"harvest_job_id":"abb06220-7a4b-40a2-ac1f-706b64ae3bfc","harvest_source_id":"f4c7bbab-c7ef-4277-a7d3-c25b78854814","id":"87303335-3cbf-49f5-a146-52c9fcc8970e","identifier":"https://dggs.alaska.gov/webpubs/metadata/PR123-data-supplement.xml","parent_identifier":null,"source_hash":"06f8a975de97a08897939d340b9a3a65580a6d9f931ed9ae4fabf77b2222fd95","source_raw":"\n\n\n\n\nNye, C.J.\nScott, W.E.\nNeill, O.K.\nWaythomas, C.F.\nCameron, C.E.\nCalvert, A.T.\n2017\nGeology of Kasatochi volcano, Aleutian Islands, Alaska\ndigital data\n\nProfessional Report\nPR 123\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n127 p., 1 sheet, scale 1:5000\nhttp://doi.org/10.14509/29718\n\n\n\nKasatochi 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. The oldest unit recognized is a thick series of mid-Pleistocene glaciovolcanic deposits consisting of autobrecciated lava, lahars, and volumetrically minor lava masses that we believe to have been emplaced underneath a regional ice cap. This unit is unconformably overlain by several massive Holocene lavas, above which lies a thick sequence of latest-Holocene pyroclastic deposits likely deposited during the crater-forming eruption. The 2008 eruption enlarged the preexisting crater, and produced pyroclastic density currents, surges, and fall that blanketed the entire island except for the crater wall and steep, seaward-facing cliffs on the flanks. 2008 deposits initially extended the shoreline seaward by up to 500 m. 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 collection of electronic data is a supplement to the Geology of Kasatochi volcano, Aleutian Islands report and geologic map. It provides spreadsheets of sample metadata and major and trace element XRF and ICP/MS data which are included in the appendices; electron microprobe mineral analyses which are discussed in the report, but not tabulated elsewhere; and high resolution versions of panoramic photographs (appendix 1) and photomicrographs (appendix 7).\nKasatochi 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.\n\n>E1_full_resolution_panoramas: Full resolution versions of panoramic photographs in appendix 1.\n>E3_sample_metadata: Sample locations and descriptions. \n>E5_whole_rock_compositions: Major and trace element analyses of rocks and mineral separates. \n>E6_modal_data: Point count data for phenocrysts and groundmass. \n>E7_photomicrographs: Full resolution versions of photomicrographs in appendix 7. \n>E8_microprobe_data: Electron microprobe analyses of minerals. \n>E9_componentry_08j: Grain size distribution of 2008 pyroclastic deposits.\n\n\n\n\n\n2008\n2017\n\n\nground condition\n\n\ncomplete\nNone planned\n\n\n\n-175.535309\n-175.488612\n52.186087\n52.155502\n\n\n\n\nISO 19115 Topic Category\ngeoscientificInformation\n\n\nAlaska Division of Geological & Geophysical Surveys\nActive Volcanoes\nAge Dates\nAleutian Arc\nAlluvial Deposits\nAnalyses\nAnalyses and Sampling\nBasalt\nBedrock\nBedrock Geology\nCaldera\nChemistry\nColluvium\nErosion\nFan\nGeochemical Data\nGeochemistry\nGeochronology\nGeologic\nGeological Process\nGeologic Hazards\nGeologic Map\nGeology\nGeomorphology\nHazards\nHistoric Eruption\nIgneous\nLava Flow\nMineralogy\nPetrographic\nPetrography\nPetrology\nPumice\nPyroclastics\nRockfall\nRocks\nSample Location\nSlope Instability\nSlump\nSoils\nSurface\nSurficial\nTalus\nTephra\nTopography\nUltramafic\nUplift\nVolcanic\nVolcanic Ash\nVolcanic Eruption\nVolcaniclastics\nVolcanic Rocks\nVolcanoes\nVolcanology\n\n\nAlaska Division of Geological & Geophysical Surveys\nAleutian Islands\nKasatochi\n\n\nWalker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America\nCenozoic\nHolocene\nQuaternary\n\n\nThis 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).\nAny 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.\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5039\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nInitial 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.\n\n\nNye, Chris\n2017\nKasatochi Island 2009 topography\n\nMiscellaneous Publication\nMP 163\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n1 sheet\nhttp://doi.org/10.14509/29733\n\n\n\n\n\nThis 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.\n\nnot applicable\nThis data release is complete.\n\n\nLocations were recorded using handheld GPS devices. Location errors reported by the GPS were not recorded.\n\n\n\n\nField data collection - Geologic field mapping and sampling were conducted during short trips on 18 days-nominally 2 to 3 days in mid-June and mid- to late-August-from 2009 through 2013. In addition to other field observations, we captured high-resolution panoramic photographs of the island flanks taken from offshore and of the crater wall taken from the rim.\n2013\n\n\nRock sample analysis - More than 110 rock samples were collected during the course of mapping. One hundred one of these samples were analyzed for major and trace elements by the Peter Hooper GeoAnalytical Lab at Washington State University. Detailed petrographic descriptions and 1,000-point modes were made using thin sections of 67 of the samples. Electron probe microanalysis (EPMA) at the Advanced Instrumentation Laboratory at the University of Alaska Fairbanks produced 3,364 mineral analyses, including core-rim pairs from 1,385 grains, from 24 representative samples, spanning all lithologic units. In addition, 40Ar/39Ar ages were obtained for three samples by the USGS, Menlo Park, California.\n2015\n\n\n\n\npoint\n\n\n\n\n0.00001\n0.00001\ndecimal degrees\n\n\nWorld Geodetic System of 1984\nWGS 84\n6378137\n298.257223563000025\n\n\n\n\n\n\npr123-E1_full_resolution_panoramas\nFull resolution versions of panoramic photographs in appendix 1.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE1_full_resolution_panoramas\n\n\n\n\npr123-E3_sample_metadata\nSample locations and descriptions.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE3_sample_metadata\n\n\n\n\npr123-E5_whole_rock_compositions\nMajor and trace element analyses of rocks and mineral separates.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE5_whole_rock_compositions\n\n\n\n\npr123-E6_modal_data\nPoint count data for phenocrysts and groundmass.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE6_modal_data\n\n\n\n\npr123-E7_photomicrographs\nFull resolution versions of photomicrographs in appendix 7.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE7_photomicrographs\n\n\n\n\npr123-E8_microprobe_data\nElectron microprobe analyses of minerals.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE8_microprobe_data\n\n\n\n\npr123-E9_componentry_08j\nGrain size distribution of 2008 pyroclastic deposits.\nAlaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory\nE9_componentry_08j\n\n\n\n\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5039\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nPR 123\nThe 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.\n\nDGGS 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.\nContact DGGS for current pricing\n\n\n\n\ndigital data\n\n\n\n\n\nhttp://doi.org/10.14509/29718\n\n\n\n\n\nFree download\n\n\n\n20170808\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5039\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nFGDC Content Standard for Digital Geospatial Metadata\nFGDC-STD-001-1998\nIf 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.\n\nhttp://www.dggs.alaska.gov/metadata/dggs.ext\ndggs metadata extensions\n\n\n\n","source_transform":null,"status":"error"}