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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.

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