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.
Wednesday, 27 December 2017
Monday, 25 December 2017
Merry Christmas
Merry Christmas
Merry Christmas and Happy New Year everyone from Louisiana.
Yours,
Paul H.
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.
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.
Sunday, 17 December 2017
Handbook of Iron Meteorites (Electronic edition) By Vagn F. Buchwald, 1975 17DEC2017
Handbook of Iron Meteorites (Electronic edition) By Vagn F. Buchwald, 1975
Handbook of Iron Meteorites: Their History,
Distribution, Composition and Structure
(Electronic edition) By Vagn F. Buchwald
Yours,
Paul H.
Monday, 11 December 2017
Whale-sized Asteroid Skimmed Past Earth Unnoticed 11DEC2017
Whale-sized Asteroid Skimmed Past Earth Unnoticed
Asteroid 2017 VL2 flew past Earth at 0.31 LD,
a day before discovery, The Watchers, November 14, 2017
https://watchers.news/2017/11/14/asteroid-2017-vl2/
Whale-sized asteroid skimmed past Earth unnoticed
New Zealand Herald, Dec. 9, 2017
http://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=11956637
Yours,
Paul H.
Sunday, 10 December 2017
Photographs of Hibbens at Fairbank Mucks 10DEC2017
Photographs of Hibbens at Fairbank Mucks
Reply to- E.P. Grondine post on Fri, 08 Dec 2017
>Hi Paul -
>
>
----------------------------------------------------------
Paul H. reply to Grondine- "The full article is:
Hagstrum, J.T., Firestone, R.B., West, A., Weaver, J.C. and
Bunch, T.E., 2017. Impact-related microspherules in Late
Pleistocene Alaskan and Yukon “muck” deposits signify
recurrent episodes of catastrophic emplacement. Scientific
Reports, 7, no. 16620.
It is wonderful to see that this topic is being argued in the
scientific literature instead of in popular books full of factual
errors about the Spokane Floods, loess, and megafloods
along with fictional claims about Atlantis.
>With the recovery of these photographs, Hibbens' wife's
>diary, and Geist's fossils, will you now consider retracting
>all of your comments on Hibbens' and his research?
No. the pictures and diary are still, by modern standards,
horribly poor and inadequate documentation of his ideas,
which was part of the times. Except for the spherules,
Hagstrum et al. (2017) make a number of assertions that
not backed up by any detailed taphonomic analysis of the
animal and plant remains and sedimentologic analysis of
the muck.
I hope this paper encourages someone to do so and test
their (Hibben's) hypothesis in due time and publish the
results in print. Unfortunately, I am working on other
stuff and will not have the time in the near future to be
that person.
There is an interesting blog about this paper at:
Comet Research Group Publishes New Article Reviving
Catastrophist Claims about Frozen Mammoths in Alaskan Muck
Yours,
Paul H.
Friday, 8 December 2017
Ancient Maya May Have Foreseen Meteor Showers 08DEC2017
Ancient Maya May Have Foreseen Meteor Showers
Ancient Maya May Have Foreseen Meteor Showers
By Kimberly M. S. Cartier. Eos, 98(12): pp. 11 – 12
Other articles in the same issue are:
Volcano Woes May Have Contributed to Ancient
Egypt’s Fall By JoAnna Wendel. Eos, 98(12): pp. 3 – 4
Playing with Water: Humans Are Altering Risk of
Nuisance Floods By Kimberly M. S. Cartier. Eos,
98(12): pp. 7 – 8
A Grand Tour of the Ocean Basins: A new teaching
resource facilitates plate tectonics studies using
a virtual guided tour of ocean basins around
the world. By Declan G. De Paor, Eos, 98(12): pp. 22 – 26.
Yours,
Paul H.
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