Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/153327
Title: Australasian impact crater buried under the Bolaven volcanic field, Southern Laos
Authors: Sieh, Kerry
Herrin, Jason
Jicha, Brian
Schonwalder Angel, Dayana
Moore, James Daniel Paul
Banerjee, Paramesh
Wiwegwin, Weerachat
Sihavong, Vanpheng
Singer, Brad
Chualaowanich, Tawachai
Charusiri, Punya
Keywords: Science::Geology
Issue Date: 2020
Source: Sieh, K., Herrin, J., Jicha, B., Schonwalder Angel, D., Moore, J. D. P., Banerjee, P., Wiwegwin, W., Sihavong, V., Singer, B., Chualaowanich, T. & Charusiri, P. (2020). Australasian impact crater buried under the Bolaven volcanic field, Southern Laos. Proceedings of the National Academy of Sciences of the United States of America, 117(3), 1346-1353. https://dx.doi.org/10.1073/pnas.1904368116
Journal: Proceedings of the National Academy of Sciences of the United States of America 
Abstract: The crater and proximal effects of the largest known young meteorite impact on Earth have eluded discovery for nearly a century. We present 4 lines of evidence that the 0.79-Ma impact crater of the Australasian tektites lies buried beneath lavas of a long-lived, 910-km3 volcanic field in Southern Laos: 1) Tektite geochemistry implies the presence of young, weathered basalts at the site at the time of the impact. 2) Geologic mapping and 40Ar-39Ar dates confirm that both pre- and postimpact basaltic lavas exist at the proposed impact site and that postimpact basalts wholly cover it. 3) A gravity anomaly there may also reflect the presence of a buried ∼17 × 13-km crater. 4) The nature of an outcrop of thick, crudely layered, bouldery sandstone and mudstone breccia 10-20 km from the center of the impact and fractured quartz grains within its boulder clasts support its being part of the proximal ejecta blanket.
URI: https://hdl.handle.net/10356/153327
ISSN: 0027-8424
DOI: 10.1073/pnas.1904368116
DOI (Related Dataset): 10.21979/N9/CTNDZQ
Rights: © 2020 The Author(s). Published by National Academy of Sciences. This open access article is distributed under Creative Commons Attribution-NonCommercialNoDerivatives License 4.0 (CC BY-NC-ND).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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