Evidence for deposition of 10 million tonnes of impact spherules across four continents 12,800 y ago
JH Wittke, JC Weaver, TE Bunch… - Proceedings of the …, 2013 - National Acad Sciences
Airbursts/impacts by a fragmented comet or asteroid have been proposed at the Younger
Dryas onset (12.80±0.15 ka) based on identification of an assemblage of impact-related …
Dryas onset (12.80±0.15 ka) based on identification of an assemblage of impact-related …
Very high-temperature impact melt products as evidence for cosmic airbursts and impacts 12,900 years ago
TE Bunch, RE Hermes, AMT Moore… - Proceedings of the …, 2012 - National Acad Sciences
It has been proposed that fragments of an asteroid or comet impacted Earth, deposited silica-
and iron-rich microspherules and other proxies across several continents, and triggered the …
and iron-rich microspherules and other proxies across several continents, and triggered the …
Origin and provenance of spherules and magnetic grains at the Younger Dryas boundary
One or more bolide impacts are hypothesized to have triggered the Younger Dryas cooling
at∼ 12.9 ka. In support of this hypothesis, varying peak abundances of magnetic grains with …
at∼ 12.9 ka. In support of this hypothesis, varying peak abundances of magnetic grains with …
[PDF][PDF] Evidence for Deposition of 10 Million Tonnes of Cosmic Impact Spherules across Four Continents 12,800 years ago
SI Fig, NC Barber Creek, NM Blackwater Draw… - 2013 - academia.edu
METHODS We extracted magnetic grains and spherules according to the protocol of
Firestone et al.(2007), as updated by Israde et al.(2012) and LeCompte et al.(2012). We …
Firestone et al.(2007), as updated by Israde et al.(2012) and LeCompte et al.(2012). We …
[PDF][PDF] Evidence for deposition
JH Wittkea, JC Weaverb, TE Buncha, JP Kennettc… - natur.cuni.cz
Airbursts/impacts by a fragmented comet or asteroid have been proposed at the Younger
Dryas onset (12.80±0.15 ka) based on identification of an assemblage of impact-related …
Dryas onset (12.80±0.15 ka) based on identification of an assemblage of impact-related …