[Rockhounds] Volcanic origin for Younger Dryas geochemical anomalies ca. 12, 900 cal B.P.

[pmodreski at aol.com]

Thanks for sharing this, Paul.
This interesting controversy has been going on for some time now, and I've read numerous papers and heard several live presentations by "the persons involved" about it.
I vote for the volcanic origin hypothesis. I have never been convinced by the evidence for a comet/meteorite impact, and I think a lot of the support for that has been based on a good dose of wishful thinking.
However, I'll always be skeptical of any paper that claims to have arrived at "the final answer" for a controversy like this!
Cheers, Pete


-----Original Message-----
From: Paul <etchplain at att.net>
To: Rockhound List <rockhounds at rockhounds.drizzle.com>
Sent: Sat, Aug 1, 2020 6:52 pm
Subject: [Rockhounds] Volcanic origin for Younger Dryas geochemical anomalies ca. 12, 900 cal B.P.

Texas cave sediment upends meteorite explanation

for global cooling by Baylor University August 1, 2020

https://phys.org/news/2020-07-texas-cave-sediment-upends-meteorite.html

The paper is:

Sun, N, Brandon, A.D., Forman, S.L., Waters, M.R.

and Befus, K.S., 2020. Volcanic origin for Younger

Dryas geochemical anomalies ca. 12,900 cal B.P.

Science Advances, 6(31), eaax8587

https://advances.sciencemag.org/content/6/31/eaax8587

Related papers:

Holliday, V.T., Bartlein, P.J., Scott, A.C. and Marlon,

J.R., 2020. Extraordinary biomass-burning episode

and impact winter triggered by the Younger Dryas

cosmic impact??? 12,800 years ago, parts 1 and 2: a

discussion. The Journal of Geology, 128(1), pp.69-94.

https://www.journals.uchicago.edu/doi/abs/10.1086/706264

Wolbach, W.S., Ballard, J.P., Mayewski, P.A., Kurbatov,

A., Bunch, T.E., LeCompte, M.A., Adedeji, V.,

Israde-Alcantara, I., Firestone, R.B., Mahaney, W.C. and

Melott, A.L., 2020. Extraordinary Biomass-Burning

Episode and Impact Winter Triggered by the Younger

Dryas Cosmic Impact??? 12,800 Years Ago: A Reply.

The Journal of Geology, 128(1), pp.95-107.

https://www.journals.uchicago.edu/doi/abs/10.1086/706265

Yours,

Paul H.

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