Studies refute hypothesis on what caused abrupt climate
change thousands of years ago, ScienceDaily, December 19, 2016
[source.wustl.edu]
[www.sciencedaily.com]

Missing Diamonds Don't Support Case for Younger Dryas Impact
Washington University in St. Louis, December 20, 2016
[spaceref.com]

A couple of papers are:

Daulton, T. L., S. Amari, A. C. Scott, M. Hardiman, N. Pinter, and
R. S. Anderson, 2016, Comprehensive analysis of nanodiamond
evidence relating to the Younger Dryas Impact Hypothesis.
Journal of Quaternary Science, Early View, First published:
19 December 2016, DOI: 10.1002/jqs.2892
[onlinelibrary.wiley.com]

Scott, A. C., M. Hardiman, N. Pinter, S. Anderson, T. L. Daulton,
A. Ejarque, P. Finch, and A. Carter-Champion, 2016, Interpreting
palaeofire evidence from fluvial sediments : a case study from
Santa Rosa Island, California with implications for the Younger
Dryas Impact Hypothesis. Journal of Quaternary Science.
First published: 19 December 2016, DOI: 10.1002/jqs.2914
[onlinelibrary.wiley.com]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)