Please use this identifier to cite or link to this item: https://hdl.handle.net/10593/27034
Title: Small impact cratering processes produce distinctive charcoal assemblages
Authors: Losiak, Anna
Belcher, C. M.
Plado, J.
Jõeleht, A.
Herd, C. D. K.
Kofman, R. S.
Szokaluk, Monika
Szczuciński, Witold
Muszyński, Andrzej
Wild, E. M.
Baker, S. J.
Keywords: impact crater
crater
meteorite impact
ejecta
charcoal
Morasko
Kaali
Whitecourt
Poland
Estonia
Canada
wildefires
charcoal reflectivity
crater identification
asteroid impact
event deposits
Issue Date: Nov-2022
Citation: Geology vol. 50 (11), 2022, pp. 1276-1280.
Abstract: The frequency of crater-producing asteroid impacts on Earth is not known. Of the predicted Holocene asteroid impact craters of <200 m diameter, only ~30% have been located. Until now there has been no way to distinguish them from “normal” terrestrial structures unless pieces of iron meteorites were found nearby. We show that the reflective properties of charcoal found in the proximal ejecta of small impact craters are distinct from those produced by wildfires. Impact-produced charcoals and wildfire charcoals must derive from different heating regimes. We suggest that charcoal with specific reflective properties may help to recognize the meteoritic origin of small craters.
Sponsorship: Marie Sklodowska-Curie grant ImpChar, agreement no. 749157; the 2016 Barringer Family Fund for Meteorite Impact Research (Arizona, USA); National Science Centre Poland grants 2020/39/D/ST10/02675 and 2013/09/B/ST10/01666.
URI: https://hdl.handle.net/10593/27034
DOI: 10.1130/G50056.1
Appears in Collections:Artykuły naukowe (WNGiG)

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