MysteriesYounger Dryas impact hypothesisArtifactsBoundary-layer sediment samples from the 2007 sitesBoundary-layer sediment samples from the 2007 sites: document
CPY0D51XYHG5SXX·Copy · sample
Boundary-layer sediment samples from the 2007 sites: document
Not kept here. This copy isn't ours to show. See it where it's published.
The marker counts by site and depth on which the hypothesis was first put.
Richard Firestone and colleagues, 2007. publisher
Copies 1
DocumentRichard Firestone and colleagues · doi.org · 2007-10-09 · publisherPrimary source: Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling2 steps from the original
Where it was made
North America · Region
Sources 2
Cite it
Mysteries Department. (2026). Boundary-layer sediment samples from the 2007 sites: document [Copy CPY0D51XYHG5SXX]. https://mysteriesdept.com/r/CPY0D51XYHG5SXX
@misc{mysteriesdept_art0d51xy9p3qfb,
title = {Boundary-layer sediment samples from the 2007 sites: document},
author = {{Mysteries Department}},
year = {2026},
note = {Artifact, catalog key CPY0D51XYHG5SXX},
url = {https://mysteriesdept.com/r/CPY0D51XYHG5SXX}
}