Reidite implies asteroid impact created Libyan Desert Glass 29MAY2019

 Reidite implies asteroid impact created Libyan Desert Glass

Mystery of Libyan desert glass solved at last. Famous
since the time of King Tut the origin of the scattered
glass fragments has long puzzled researchers. Aaron
Cavosie from Australia's Curtin University explains.
https://cosmosmagazine.com/archaeology/mystery-of-libyan-desert-glass-solved-at-last

Planetary scientists unravel mystery of Egyptian
desert glass by Curtin University, PhysOrg
https://phys.org/news/2019-05-planetary-scientists-unravel-mystery-egyptian.html
https://www.sciencealert.com/exotic-glass-in-egypt-was-created-by-a-meteorite-impact-millions-of-years-ago

100-Year Mystery Solved, Yellow Glass In Egyptian
Desert Caused By Meteorite Strike, Athena Chan, Tech Times
https://www.techtimes.com/articles/243406/20190518/100-year-mystery-solved-yellow-glass-in-egyptian-desert-caused-by-meteorite-strike.htm

The paper is:

Cavosie, A.J. and Koeberl, C., 2019. Overestimation of
threat from 100 Mt class airbursts? High-pressure
evidence from zircon in Libyan Desert Glass. Geology.
DOI: 10.1130/G45974.1
https://pubs.geoscienceworld.org/gsa/geology/article/570318/Overestimation-of-threat-from-100-Mtclass

Another open access paper is:

Koeberl, C. and Ferrire, L., 2019. Libyan Desert Glass area
in western Egypt: Shocked quartz in bedrock points to a
possible deeply eroded impact structure in the region.
Meteoritics & Planetary Science. open access
https://onlinelibrary.wiley.com/doi/abs/10.1111/maps.13250

Yours,

Paul H.

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.

Reidite and Shock-twinned Zircon Found in Rock Elm Impact Structure (Wisconsin)

Reidite and Shock-twinned Zircon Found in Rock Elm Impact Structure (Wisconsin)

Rare mineral found in a Wisconsin crater
by Aaron L. Gronstal, Astrobiology Magazine
http://phys.org/news/2015-01-rare-mineral-wisconsin-crater.html

Rare Mineral Discovered in Ancient Meteorite
Impact Crater, Live Science, Nov 3, 2014
http://www.livescience.com/48584-reidite-discovered-rock-elm-wisconsin.html

Wisconsin town took a big hit - and rare
mineral proves it by Andy Rathbun
TwinCitiescom, Pioneer Press, Nov 24, 2014
http://www.twincities.com/localnews/ci_26987773/wisconsin-town-took-big-hit-and-rare-mineral

Cavosie, A.J, T. M> Erickson, and N. E. Timms,
2014, Reidite and shock-twinned zircon in polymict
breccia from the Ordovician Rock Elm impact
structure, USA. Geological Society of America
Annual Meeting Abstracts with Programs, vol. 46, no. 6
https://gsa.confex.com/gsa/2014AM/webprogramschedule/Paper244685.html

Yours,

Paul H.