Julian Albanil

Younger Dryas Impact Hypothesis

Kailey Ellison, Julian Albanil, Hannah M. Palmer, Charlie Sanchez

The Younger Dryas Period, dating approximately 12,800 years ago, is characterized by an abrupt cooling event associated with widespread ecological disruption and mass extinction. Evidence suggests that this rapid climate shift may have been triggered by a cosmic event, forming the basis …

Platinum-group elements, shocked quartz, and nanodiamonds in a Greenland ice-margin sequence at the Younger Dryas onset

James P. Kennett, Paul A. Mayewski, Andrei V. Kurbatov, Wendy S. Wolbach et autres

Here, we present a multidisciplinary investigation of a late-Pleistocene Greenland ice-margin sequence near Kangerlussuaq that spans the Bølling-Allerød, Younger Dryas, and early Holocene. This study investigates the cause of the Younger Dryas (YD) cooling event (~12,800 years ago) and its possible relationship …

Investigation of The Younger Dryas Impact Hypothesis

Yoav Rapoport, Arturo Sarmiento-Reyes, Ravi Holladay, Kailey Ellison et autres

Does geochemical evidence support the Younger Dryas ImpactHypothesis as the cause of abrupt climate change?Investigating the Younger Dryas Impact Hypothesis using soilsamples from global sites.Focus: Black Mat layers dated to ~12,800 years ago.Tools: Scanning Electron Microscopy (SEM) and EnergyDispersive X-ray Spectroscopy (EDS) …

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Evidence of a 12,800-year-old Shallow Airburst Depression in Louisiana with Large Deposits of Shocked Quartz and Melted Materials

Robert Fitzenreiter, K. Ernstson, G. Kletetschka, Malcolm A. LeCompte et autres

We report evidence of a likely low-altitude cosmic airburst near Perkins, Louisiana, associated with semi-consolidated deposits containing abundant shocked quartz grains, a classical impact indicator, along with spherules, meltglass, and microbreccia. Analytical techniques employed on these materials include optical microscopy, the universal …