Including Original "Paul H. Letters" Copyright © 1996-2017 Paul V. Heinrich - All rights reserved.



Saturday, 31 March 2007

Impact Origin of Silverpit Structure Disputed

Impact Origin of Silverpit Structure Disputed

Paul bristolia at yahoo.com
Fri Mar 30 09:48:46 EDT 2007

The controversy over the origin of the Silverpit
Structure continues.

UK impact crater debate heats up by Jonathan Fildes
BBC News, March 30, 2007

http://news.bbc.co.uk/2/hi/science/nature/6503543.stm

Geology of Silverpit Structure Area

http://news.bbc.co.uk/2/hi/science/nature/6503543.stm#map

Alternative Theory for Origin of Silverpit Structure

http://news.bbc.co.uk/2/shared/spl/hi/pop_ups/07/sci_nat_enl_1175254561/html/1.stm

Best Regards,

Paul
Baton Rouge, LA

New Meteorite Crater Found in California

New Meteorite Crater Found in California

Paul bristolia at yahoo.com
Fri Mar 30 09:04:18 EDT 2007

1. Giant Meteorite Hit Ancient California, Crater Study Suggests
by John Roach, National Geographic News, March 27, 2007

http://news.nationalgeographic.com/news/2007/03/070327-california-crater.html

"The proposed impact may have created the giant 3.4-mile-wide
(5.5-kilometer-wide) craterlike formation that the team found
buried 4,900 to 5,250 feet (1,490 to 1,600 meters) below sea
level west of Stockton, California."

they think it is between 37 to 49 million years old.

++++

2. Oil exploration in California Reveals Giant Impact Crater
CCN Magazine, CA - Mar 22, 2007

http://www.ccnmag.com/news.php?id=4947

++++

3. Crater' spied under California, BBC News, UK, March 16, 2007

http://news.bbc.co.uk/2/hi/science/nature/6458841.stm

Bets Regards,

Paul
Baton Rouge, LA

Friday, 30 March 2007

Need Recommendations for Petrographic Thin Section Maker

Need Recommendations for Petrographic Thin Section Maker

Paul bristolia at yahoo.com
Thu Mar 29 14:45:50 EDT 2007

Dear list members,

I need a number of petrographic thin sections made
for a project. Unfortunately, the petrographic thin
section lab, which I used has gone out of business.

Can anyone recommend, off list if desired, one or
more petrographic thin section lab(s), who make
quality standard petrographic thin sections?

Yours,

Paul
Baton Rouge, LA

Wednesday, 14 March 2007

New Paper in Chicxulub - K-T Boundary Controversy Published

New Paper in Chicxulub - K-T Boundary Controversy Published

Paul bristolia at yahoo.com
Tue Mar 13 08:36:08 EDT 2007

Dr. Gerta Keller and coauthors have published another paper
about their hypothesis that the Chicxulub impact predates
K–T boundary. This time, they reinterpret the K-T Boundary
found exposed along and near the Brazos River in Texas.

The paper is:

Keller, G., T. Adatte, Z. Berner, M. Harting, G. Baum, M.
Prauss, A. Tantawy and D. Stueben, 2007, Chicxulub impact
predates K–T boundary: New evidence from Brazos, Texas.
Earth and Planetary Science Letters. vol. 255, no. 3-4 , 30
pp. 339-356. doi:10.1016/j.epsl.2006.12.026

The link to the abstract can be found at:

http://www.sciencedirect.com/science/journal/0012821X

Best Regards,

Paul H.

Monday, 12 March 2007

Impact Origin of Carolina Bays Argued For at 2007 AGU Meeting

Impact Origin of Carolina Bays Argued For at 2007AGU Meeting

Paul bristolia at yahoo.com
Sun Mar 11 11:04:01 EDT 2007

Sterling K. Webb wrote on Sun March 11, 2007

>Hi, List,

>

>Thanks, Paul, for those links.

You and the list might be interested to know that
there is a competing session Carolina Bays. A more
mainstream point of view on their formation will be
given at the Geological Society of America Southeastern
Section-56th Annual Meeting (29-30 March 2007) in a
session titled "S6. Geology and Ecology of Carolina
Bays" at:

http://gsa.confex.com/gsa/2007SE/finalprogram/session_18800.htm

The paper in this session include 1. "The Sedimentology
and Ages of Carolina Bays Sand Rims" by Dr. Ivestor at:

http://gsa.confex.com/gsa/2007SE/finalprogram/abstract_119179.htm

This abstract states in part:

"Water-lain pebbles intercalated with eolian sands indicate
that these are typical shoreline deposits resulting from
fluctuations in water level."

"At individual bays where concentric rims occur, dating has
established that rims are progressively younger toward the center
of the bay, reflecting a regressive sequence and confirming that
the bays are not single-event features but evolve as a result of
processes active episodically over a long period of time. Active
shorelines and associated eolian deposition occurred during
marine isotope stage (MIS) 2 to late MIS 3 (~12 to 50 ka), MIS 4
to very late MIS 5 (60-80 ka), and late MIS 6 (120 to 140 ka)
based on a cumulative total of 45 OSL dates. These age ranges
also correspond with the ages of other eolian landforms in the
Coastal Plain, including sand sheets and dunefields, and suggest
a climatic threshold was crossed during the transition toward
glacial stadials, initiating both bay and dune activity."

Another abstract is "Geomorphic History of the Carolina Bays"
by Ray Kaczorowski at:

http://gsa.confex.com/gsa/2007SE/finalprogram/abstract_118906.htm

Needless to say, this activity will be quite fun to watch as
all of these ideas are sorted out.

Best Regards,

Paul H.

Sunday, 11 March 2007

Meteorite Article From Gem and Mineral Society Newsletter

Meteorite Article From Gem and Mineral Society Newsletter

Paul bristolia at yahoo.com
Sat Mar 10 17:50:38 EST 2007

An example of what is being written about meteorites
in the newsletters of gem and mineral societies can
be found online. It is:

Rike III, Z. W., 2006, Meteoroids, Meteors and
Meteorites - Part 1. Pineywoods Rooter, Novmeber 2006,
Pine Country Gem & Mineral Society.

This article is repinted on pages 27 – 31 of vol. 38,
no.2 (February 2007) of the Backbend's Gazette, which
published by the Houston Gem and Mineral Society
( http://www.hgms.org/ ). The article and issue
can downloaded from the February 2007 link on the back
issue web page at:

http://www.hgms.org/Backbender'sGazetteIssues.html

and directly from:

http://www.hgms.org/BBG/Feb07.pdf

One way of reaching new people, would be to write popular
articles for your local Gem and Mineral Society about
various topics related to meteorites, impactites, tektites,
and so forth. These newsletters would be a good places
to educate the public about meteorites and meteorwrongs.

Best Regards,

Paul H.

Impact Origin of Carolina Bays Argued For at 2007 AGU Meeting

Impact Origin of Carolina Bays Argued For at 2007 AGU Meeting

Paul bristolia at yahoo.com
Sat Mar 10 15:00:15 EST 2007

Dear Friends,

Apparently, there is going to be some interesting papers
at the 2007 Joint Assembly of the American Geophysical
Union as there will be a session presenting evidence for
an impact having occurred during Younger-Dyras times
at the "end of the last Ice Age. Below are links to
representative abstracts:

1. Evidence for an Extraterrestrial Impact Event 12,900 years
ago that Contributed to Megafaunal Extinctions and the Younger
Dryas Cooling

http://submissions5.agu.org/aguconvener/ConvenerView.asp?ref=1388

2. Formation of the Carolina Bays: ET Impact vs. Wind-and-Water
http://submissions5.agu.org/aguconvener/ConvenerView.asp?ref=1334

3. Extraterrestrial Markers Found at Clovis Sites Across North
America

http://submissions5.agu.org/aguconvener/ConvenerView.asp?ref=1393

4. Is There Evidence for Impact-Triggered Fires at the End
Pleistocene?

http://submissions5.agu.org/aguconvener/ConvenerView.asp?ref=513

The session itself is " PP05: New Insights into Younger Dryas
Climatic Instability, Mass Extinction, the Clovis People, and
Extraterrestrial Impacts

http://www.agu.org/meetings/ja07/?content=search&show=detail&sessid=159

It looks like Firestone and his supporters are refining their
arguments and dropping the implausible ones, i.e. the so-called
meteor crater in Lake Michigan, and concentrating on what they
regard the basic evidence for their ideas.

Best Regards,

Paul H.


Saturday, 10 March 2007

Many United States Geological Survey Publications Now Online

Many United States Geological Survey Publications Now Online

Paul bristolia at yahoo.com
Fri Mar 9 10:12:19 EST 2007

Gary wrote:

“DJVU files... does this stand for Deja Vu files? I
have some of them that pop up once in a while :)”

Yes. I would much prefer if the USGS had used PDF
files instead. I have no idea why they choose the
Deja Vu format over the PDF format.

The plugins for Deja Vu files can be found at

http://www.lizardtech.com/download/dl_download.php?detail=doc_djvu_plugin&platform=win

or

http://www.lizardtech.com/download/dl_download.php?detail=doc_djvu_plugin&platform=macx

For some reason my Mac PowerPC G5 does not
print Deja Vu files. Although it acts like it is
printing the files, nothing ever comes out of the
Tektronix Phaser 7300 printer.

Yours,

Paul

Friday, 9 March 2007

Many United States Geological Survey Publications Now Online

Many United States Geological Survey Publications Now Online

Paul bristolia at yahoo.com
Thu Mar 8 22:32:48 EST 2007

Many Unites States Geological Survey Publications are
now online as DJVU files. Advanced Search for these
publications is at:

http://pubs.er.usgs.gov/usgspubs/index.jsp

For example, meteorite related USGS publications, which
can be viewed and downloaded are:

1. Cosmochemistry; Part 1, Meteorites, Professional Paper
440-B-1, by B. Mason at:

http://pubs.er.usgs.gov/usgspubs/pp/pp440B1

and 2. The disintegration of the Wolf Creek meteorite
and the formation of pecoraite, the nickel analog of
clinochrysotile, Professional Paper 384-C, by Faust,
George T.; Fahey, J. J.; Mason, B. H.; and Dwornik, E. J.

http://pubs.er.usgs.gov/usgspubs/pp/pp384C

Yours,

Paul H.

Thursday, 8 March 2007

"Meteorites in Indiana" web page

"Meteorites in Indiana" web page

Paul bristolia at yahoo.com
Thu Mar 1 08:24:49 EST 2007

Dear Friends,

There is a "Meteorites in Indiana" web page at

http://igs.indiana.edu/geology/extraTerrestrial/meteorites/index.cfm

They have a list of meteorites found in Indiana.

Best Regards,

Paul
Baton Rouge, LA