Including Original "Paul H. Letters" Copyright © 1996-2018 Paul V. Heinrich - All rights reserved.



Wednesday, 27 December 2017

New clues about Earth’s most elusive impact crater

New clues about Earth’s most elusive impact crater

Cavosie, A.J., N.E. Timms, T.M. Erickson, and C. Koeberl, 2017,
New clues from Earth’s most elusive impact crater: Evidence
of reidite in Australasian tektites from Thailand. Geology
Published: December 20, 2017 DOI: https://doi.org/10.1130/G39711.1
https://pubs.geoscienceworld.org/gsa/geology/article-abstract/525531/new-clues-from-earth-s-most-elusive-impact-crater?

" Here we report new evidence of a rare high-pressure
phase in Australasian tektites that further constrains
the location of the source crater. The former presence
of reidite, a high-pressure polymorph of zircon, was
detected in granular zircon grains within Muong
Nong–type tektites from Thailand."

"The data presented here place further constraints on the
distribution of high-pressure phases in Australasian tektites,
including coesite and now reidite, to an area centered over
Southeast Asia, which appears to be the most likely location
of the source crater."

Yours,

Paul H.

Monday, 25 December 2017

Merry Christmas

Merry Christmas

Merry Christmas and Happy New Year everyone from Louisiana.
Yours,
Paul H.

Monday, 18 December 2017

Did Meteorites Help Start Life ?

Did Meteorites Help Start Life ?

Evidence suggests life on Earth started after meteorites splashed into warm little ponds, PhysOrg, October 2, 2017
https://phys.org/news/2017-10-evidence-life-earth-meteorites-splashed.html

How did Life Start? Meteorites crashing into Darwin's Little Warm Ponds May Have been Trigger, by Megham Bartels, Newsweek.
http://www.newsweek.com/2017/10/27/how-did-life-start-meteorites-crashing-darwins-warm-little-ponds-was-possible-675655.html

The paper is:

Pearce, B.K., Pudritz, R.E., Semenov, D.A. and Henning, T.K., 2017. Origin of the RNA world: The fate of nucleobases in warm little ponds. Proceedings of the National Academy of Sciences, vol. 114 no. 43, pp. 11327-11332
http://www.pnas.org/content/114/43/11327 https://arxiv.org/pdf/1710.00434.pdf

Yours,

Paul H.