8a455596-d19c-45b8-8210-090727b27e7a_source eng; USA utf8 dataset Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact 2026-01-26 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) Radiocarbon dates, stratigraphic sections, and sample location data for samples collected at Pavlof Volcano and vicinity, Alaska 2026-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Waythomas, C.F. originator Izbekov, P.E. originator Larsen, J.F. originator Mulliken, K.M. originator Wasser, V.K. originator https://doi.org/10.14509/31733 tableDigital Raw Data File RDF 2025-26 30 p. Radiocarbon dates, stratigraphic sections, and sample location data for samples collected at Pavlof Volcano and vicinity, Alaska, Raw Data File 2025-26, presents the results of radiocarbon dating and stratigraphic studies of volcanic ash deposits in the area around Pavlof Volcano, Alaska. We collected samples for radiocarbon dating during 10-day-long field excursions to the area in 2017-2022. In addition to collecting soil-organic matter samples for dating, we recorded stratigraphic profiles in field notebooks and documented them with digital photographs. The goal of this work is to establish the stratigraphic framework of tephra-fall deposits from Pavlof Volcano to aid in documenting the Holocene eruptive history of the volcano as recorded by the tephra deposits. These data consist of a .csv file, annotated photographs, and line drawings of stratigraphic profiles. These data are provided as a Raw Data File under an open end-user license and are available on the DGGS website: http://doi.org/10.14509/31733. We establish the stratigraphic framework of tephra-fall deposits from Pavlof Volcano to document its Holocene eruptive history. By reconstructing past eruptions, we improve the basis for assessing future volcanic hazards in Alaska. This report is based on work supported by the U.S. Geological Survey in a cooperative agreement with the University of Alaska Fairbanks Geophysical Institute and under Cooperative Agreement No. G22AC00137 with the Alaska Division of Geological & Geophysical Surveys. Radiocarbon ages were determined by the University of Georgia Center for Applied Isotope Studies under contract to the U.S. Geological Survey Alaska Volcano Observatory. Lodging provided by Mary Martin at the Cold Bay Lodge in Cold Bay, Alaska, was greatly appreciated. Maritime Helicopters and Egli Air Haul. Pilots Jared Berman and Sam Egli provided efficient, safe, and professional transportation in the field areas. completed Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. pointOfContact notPlanned Active Volcanoes Analyses Analyses and Sampling Analytical Lab Results Ashfall Coastal Coastal and River DGGS Eolian Geologic Geology Hazards Methods Peat Radiocarbon Ages Radiocarbon Dating Sample Location Stratigraphy Surface Surficial Tephra Tephrostratigraphy Volcanic Volcanic Ash Volcanic Deposits Volcanic Eruption Volcanic Rocks Volcaniclastic Volcaniclastic Deposits Volcaniclastics Volcanoes Volcanology theme Alaska Division of Geological & Geophysical Surveys Bear Bay Belkofski Bay Bering Sea Bristol Bay Herendeen Bay Pacific Ocean Pavlof Sister Pavlof Volcano Trader Mountain place Alaska Division of Geological & Geophysical Surveys Holocene temporal 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 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. otherRestrictions 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. otherRestrictions 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). Historically active volcanoes of Alaska 2016-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Cameron, C.E. originator Schaefer, J.R. originator https://doi.org/10.14509/27061 Digital Data Series DDS 6 crossReference Alaska Volcano Observatory image database 2016-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Cameron, C.E. originator Snedigar, S.F. originator https://doi.org/10.14509/29689 Digital Data Series DDS 13 crossReference Recently active volcanoes of Alaska 2023-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Cameron, C.E. originator Bull, K.F. originator Macpherson, A.E. originator https://doi.org/10.14509/31086 Miscellaneous Publication MP 133 v. 6 2 sheets crossReference Geologic Database of Information on Volcanoes in Alaska (GeoDIVA) 2022-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Cameron, C.E. originator Crass, S.W. originator AVO Staff originator https://doi.org/10.14509/30901 Digital Data Series DDS 20 crossReference Alaska Volcano Observatory geochemical database, version 2 2019-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Cameron, C.E. originator Mulliken, K.M. originator Crass, S.W. originator Schaefer, J.R. originator Wallace, K.L. originator https://doi.org/10.14509/30058 Digital Data Series DDS 8 v. 2 22 p crossReference Bibliography of information on Alaska volcanoes 2003-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Cameron, C.E. originator Triplehorn, J.H. originator Robar, C.L. originator https://doi.org/10.14509/2880 Miscellaneous Publication MP 131 crossReference The Volcanology section at DGGS 2018-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Mulliken, K.M. originator https://doi.org/10.14509/30118 Information Circular IC 74 2 p crossReference vector eng; USA geoscientificInformation -162.514955 -161.711980 55.117220 55.795400 2017-01-01 2025-01-01 >Analytical data: Table of field locations, sample metadata, radiocarbon measurements, calibrated ages, analytical details, and an accompanying data dictionary. true spreadsheet unknown Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. distributor Contact DGGS for current pricing Free download https://doi.org/10.14509/31733 spreadsheet table information dataset Horizontal Positional Accuracy Report Sample site locations were determined with hand-held GPS devices and recorded in field notebooks. Data are provided in NAD83 datum. This data release is complete. This data release is complete. Not applicable This lineage was generated by the FGDC CSDGM to 19139 transformation Field data collection - Stratigraphic profiles were selected for study in the field. They consisted of natural stream bank exposures or hand-dug pits. We scraped exposure surfaces clean with shovels and trowels to better expose the tephra deposits and associated buried soils, recorded the apparent vertical thickness of each unit, and collected samples of tephra and soil-organic matter for later analysis. 2022-01-01T00:00:00 Sample analysis - Researchers collected buried soil samples from 26 sites beneath major tephra layers, then dried and prepared them before sending them to the University of Georgia's Center for Applied Isotope Studies for radiocarbon analysis. In the lab, humic acids were isolated from the soils through sieving, acid treatment, alkaline extraction, precipitation, and drying, while peat samples underwent a similar cleaning process before combustion. Radiocarbon measurements were obtained using accelerator mass spectrometry, with isotopic ratios corrected for natural fractionation. Results were reported as percent modern carbon and as radiocarbon years before present (BP), based on a 5,568-year half-life. These uncalibrated dates were then converted to calendar ages using the CALIB 7.1 calibration program, which relies on tree-ring and other independently dated records. Final calibrated ages are expressed as cal BC, cal AD, or cal BP, corresponding directly to actual calendar years. Additional methodological detail and full analytical results are provided in the accompanying report. 2023-01-01T00:00:00 otherRestrictions Metadata Use Constraints: 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. unknown This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2019-08-12T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact