Meteoritic event recorded in Antarctic ice

This is the authors' abstract. We don't add key points for this paper.

Research Article| July 01, 1998 Meteoritic event recorded in Antarctic ice Ralph P. Harvey; Ralph P. Harvey 1Department of Geological Sciences, Case Western Reserve University, Cleveland, Ohio 44106 Search for other works by this author on: GSW Google Scholar Nelia W. Dunbar; Nelia W. Dunbar 2Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 Search for other works by this author on: GSW Google Scholar William C. McIntosh; William C. McIntosh 2Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 Search for other works by this author on: GSW Google Scholar Richard P. Esser; Richard P. Esser 2Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 Search for other works by this author on: GSW Google Scholar Kuni Nishiizumi; Kuni Nishiizumi 3Space Sciences Laboratory, University of California, Berkeley, California 94720 Search for other works by this author on: GSW Google Scholar Susan Taylor; Susan Taylor 4Cold Regions Research and Engineering Laboratory, Hanover, New Hampshire 03755-1290 Search for other works by this author on: GSW Google Scholar Marc W. Caffee Marc W. Caffee 5Lawrence Livermore National Laboratory, Livermore, California 94550 Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (7): 607–610. https://doi.org/10.1130/0091-7613(1998)026<0607:MERIAI>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Ralph P. Harvey, Nelia W. Dunbar, William C. McIntosh, Richard P. Esser, Kuni Nishiizumi, Susan Taylor, Marc W. Caffee; Meteoritic event recorded in Antarctic ice. Geology 1998;; 26 (7): 607–610. doi: https://doi.org/10.1130/0091-7613(1998)026<0607:MERIAI>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract During systematic sampling of volcanic ash (tephra) layers at a well-known Antarctic meteorite collection site (the Allan Hills main ice field), a band of unusually dark and rounded (many spheroidal) particles was discovered. This debris layer (BIT-58) extends parallel to the stratigraphy of the ice established from the tephra bands, apparently marking a single depositional event. The shapes, internal texture, major element composition, and levels of cosmogenic nuclides of particles from within BIT-58 all strongly suggest that this material represents ablation debris from the passage of a large H-group ordinary chondrite. Preliminary cosmogenic isotope dating suggests an age of 2.8 Ma, implying that the East Antarctic ice sheet has been stable since that time. The relationship of the Bit-58 layer to known impact events is not clear. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.