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

Tuesday, 31 March 2009

NOVA: Comet Airburst Destruction


Mysterious White Rabbit Comes & Goes in Time

NOVA: Comet Airburst Destruction

Paul bristolia at
Tue Mar 31 23:17:38 EDT 2009

Keith wrote

>On PBS tonight in the US is about Meteorite impacts

>on Earth or see it online at , NOVA: Comet

>Airburst Destruction


>See how explosion three miles above Earth would act

>like a white-hot tornado on the surface. .



Also, there is the Libyan Desert Glass and the mysteriously
craterless Australasian tektite field, which the above URLs
need to be kept in mind, while contemplating.

Best Wishes

Paul H.

Did Giant Salt Lakes Cause Permian Mass Extinction ???

Did Giant Salt Lakes Cause Permian Mass Extinction ???

Paul bristolia at
Tue Mar 31 23:09:44 EDT 2009

New Theory On Largest Known Mass Extinction In Earth's
History: The largest mass extinction in the history of
the earth could have been triggered off by giant salt
lakes, whose emissions of halogenated gases changed the
atmospheric composition so dramatically that vegetation
was irretrievably damaged, Science Daily, March 31, 2009,

New theory on largest known mass extinction in the history
of the earth. Did volatile halogenated gases from giant
salt lakes at the end of the Permian Age lead to a mass
extinction of species?

Weissflog, L. N.F. Elanskii, K. Kotte, F. Keppler, A.
Pfennigsdorff, C.A. Lange, E. Putz, L.V. Lisitzina, 2009,
Late Permian Changes in Conditions of the Atmosphere and
Enviroments Caused by Halogenated Gases. Dokladi Earth
Sciences. vol. 424, no. 6, pp. 818-823.


Paul H.

Thursday, 26 March 2009

Origin of Sirente “crater” (sag) disputed

Origin of Sirente “crater” (sag) disputed

Paul bristolia at
Thu Mar 26 09:08:34 EDT 2009

An article in journal of Geophysical Research disputes
the origin of the what has been called the “Sirente crater”.

The paper discussing this theory is:

Speranza, F., I. Nicolosi, N. Ricchetti, G. Etiope, P. Rochette,
L. Sagnotti, R. De Ritis, and M. Chiappini (2009), The
“Sirente crater field,” Italy, revisited. Journal of Geophysical
Research. vol. 114, B03103, doi:10.1029/2008JB005759

They concluded:

“Our data show that the Sirente crater and the minor
depressions are simply the results of human activity and
karstic processes, respectively.”

An article that discusses this paper is:

Bondre, N., 2009, Geomorphology: Crater or not? Nature
Geoscience. vol 2, no. 3, p. 166.

TOC at

PDF file at


Paul H.

Wednesday, 25 March 2009

Kennett Talk and NOVA special on Younger Dryas Impacts

Kennett Talk and NOVA special on Younger Dryas Impacts

Paul bristolia at
Wed Mar 25 09:50:45 EDT 2009

E.P. Grondine mentioned the below NOVA Special in his post,
“[meteorite-list] NOVA special on Holocene Start Impacts and AD”.

PBS Program to Feature Two UMaine Scientists, March 23, 2009

Dr. Kennett gave a talk, which included a lot of research that is either
being prepared for publication, been submitted for publication, and in
press. Dr. Kennett made a very convincing case that something unique,
extraordinary, and instantaneous occurred at the beginning of the
Younger Dryas about 12,900 B. calender years ago and could be an
event that was extraterrestrial in nature. His idea that it involved
multiple, simultaneous Tunguska-like events occurring across the
North American continent.

He also, discussed and showed pictures of the research on the
Greenland ice sheet, carried out by Paul Mayewski, and Andrei
Kurbatov. Outcropping along the edge of the Greenland Ice Sheet
is a well defined Younger Dryas bed, which consists of dark grey
dusty ice with clean, white Holocene ice above it and clean, white
terminal Pleistocene ice below it. They found the nannodiamonds
and other alleged impact indicators right at and only at the basal
contact of the Younger Dryas ice layer. They found exactly what
would be expected for an layer of meteoritic debris from Tunguska-
like events.

This is a show that you do not want to miss.

It is in the realm of possibility, that decade or so from now, Dr.
West, Dr. Kennett, and other members the YDB Group will likely
be known as the "Walter Alvarezes of the Quaternary.

I am now getting together with a couple of archaeologists to do
some “prospecting” for nannodiamonds and microspherules.

Some relevant publications:

Haynes, V. C., Jr., 2008, Younger Dryas “black mats” and the
Rancholabrean termination in North America. Proceedings of the
National Academy of Sciences. vol. 105 no. 18 6520-6525

Did a Significant Cool Spell Mark the Demise of Megafauna?

Kennett, J.D., J.P. Kennett, G.J. West, J.M. Erlandson, J.R.
Johnson, I.L. Hendy, A. West, B.J. Culleton, T.L. Jones and
Thomas W. Stafford Jr., 2008, Quaternary Science Reviews.
vol. 27, no. 27-28, pp. 2530-2545.

Kennett, D.J., J. P. Kennett, A. West, C. Mercer, S. S. Que
Hee, and L. Bement, 2009, Nanodiamonds in the Younger Dryas
Boundary Sediment Layer. Science. vol. 323, no. 5910, p. 94.

Best Regards,

Paul H

Tuesday, 17 March 2009

The terrestrial Permian-Triassic boundary event bed is a nonevent

The terrestrial Permian-Triassic boundary event bed is a nonevent

Paul bristolia at
Tue Mar 17 13:18:58 EDT 2009

New paper about the Permian-Triassic boundary is South Africa
has been published in the March 2009 issue of “Geology”. It
argues that the so-called “event bed” that allegedly marks the
Permian-Triassic boundary neither marks it nor can be used to
interpreted paleoenvironmental changes that occurred during
the Permian-Triassic extinction event. The paper is:

Gastaldo, R.A., J. Neveling2, C.K. Clark, and S.S. Newbury, 2009,
The terrestrial Permian-Triassic boundary event bed is a nonevent
Geology. vol. 37, no. 3, pp. 199-202, doi:10.1130/G25255A.1

The abstract for Gastaldo, et al. (2009) can be found at:

and the PDF file for it can be obtained from either:


“ GSA Data Repository Item 2009056, The terrestrial Permian-Triassic
boundary event bed is a non-even” is downloadable from:


Paul H.

Friday, 13 March 2009

Renewed Interest in Asteroid Defence

Renewed Interest in Asteroid Defence

Fri Mar 13 16:32:33 EDT 2009

Near Miss Renews U.N. Interest in Asteroid Defence By Thalif Deen,
Inter Press Service,

NEO News (03/12/09) UN Report on NEO Threat Mitigation

NEO News (03/07/09) Newsworthy NEAs: 2009DD45 & 2008TN166

Surprise Asteroid Buzzed Earth Monday, National Geographic, March 2, 2009,

EDITORIAL COMMENT | Cosmic Near-miss, Times of India,
March 11, 2009


Paul H.