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



Saturday, 22 August 2009

PDF Files About Permian-Triassic Extinction

PDF Files About Permian-Triassic Extinction

Paul bristolia at yahoo.com
Sat Aug 22 08:28:57 EDT 2009

Dear Friends,

While searching the web, I came across some interestiung PDF files of
papers about the Permian-Triassic extinction.

They are:

Retallack, G. J., 2009, Greenhouse crises of the past 300 million years.
Geological Society of America Bulletin. vol 121, no. 9-10, pp. 1441-145.

Abstract at http://gsabulletin.gsapubs.org/content/121/9-10/1441.abstract

PDF file at
http://www.uoregon.edu/~dogsci/_media/directory/faculty/greg/geologicalsocietyofamericabulletin2009-utah.pdf?id=directory%3Afaculty%3Agreg%3Apublications&cache=cache

and http://www.uoregon.edu/~dogsci/directory/faculty/greg/publications

Retallack, G. J., 2005, Permian greenhouse crises, in Lucas, S.G. and
Ziegler, K.E., ed., The nonmarine Permian. Bulletin New Mexico Museum
of Natural History and Science. no. 30, pp. 256-269.

PDF file at
http://www.uoregon.edu/~dogsci/_media/directory/faculty/greg/permiancrises.pdf?id=directory%3Afaculty%3Agreg%3Apublications&cache=cache

and http://www.uoregon.edu/~dogsci/directory/faculty/greg/publications

Benton, M. J., and R. J. Twitchett, 2003, How to kill (almost) all life: the
end-Permian extinction event. Trends in Ecology & Evolution. vol. 18,
no. 7, pp. 358-365.

Abstract at http://dx.doi.org/10.1016/S0169-5347(03)00093-4

PDF file at http://webh01.ua.ac.be/funmorph/raoul/macroevolutie/Benton2003.pdf

and http://webh01.ua.ac.be/funmorph/raoul/macroevolutie/macroevolutie.htm

Yours,

Paul H.

Wednesday, 12 August 2009

Velingara circular structure

Velingara circular structure

Paul bristolia at yahoo.com
Wed Aug 12 17:11:11 EDT 2009

Wade, S., Barbieri, M., and Lichtenegger, J., 2001,
Focus Earth: the Velingara circular structure - a
meteorite impact crater? ESA Bulletinm no. 106,
pp. 135 – 139.

http://www.esa.int/esapub/bulletin/bullet106/bul106_13.pdf
http://www.esa.int/esapub/pi/bulletinPI.htm

Yours,

Paul

Canadian Impact Crater - Online PDF papers and Theses

Canadian Impact Crater - Online PDF papers and Theses

Paul bristolia at yahoo.com
Wed Aug 12 16:44:57 EDT 2009

Henrik Westbroek, H., 1997, Seismic interpretation of two possible
meteorite impact craters: White Valley, Saskatchewan and Purple
Springs, Alberta. Unpublished M.S. Thesis, University of Calgary,
Calgary, Alberta, Canada.

http://dspace.ucalgary.ca/handle/1880/26906
https://dspace.ucalgary.ca/bitstream/1880/26906/1/31378Westbroek.pdf
https://dspace.ucalgary.ca/browse-title?top=1880%2F39405

Mazur, M. J., 1999, The seismic characterization of meteorite
impact structures. Unpublished M.S. Thesis, University of Calgary,
Calgary, Alberta, Canada.

https://dspace.ucalgary.ca/handle/1880/39754
https://dspace.ucalgary.ca/bitstream/1880/39754/1/49711Mazur.pdf
https://dspace.ucalgary.ca/browse-title?top=1880%2F39405

Mazur, Michael J. , Robert R. Stewart, Alan R. Hildebrand, Don
C. Lawton, and Hans-Hendrik Westbroek, 2000, Seismic
characterization of impact craters. CSEG Recorder. vol. 25,
no. 6, pp. 10, 12-16.

http://www.cseg.ca/publications/recorder/2000/06jun/jun00-impact-craters.pdf
http://www.cseg.ca/publications/recorder/2000/06jun.cfm

Mazur, Michael J. , Robert R. Stewart, Alan R. Hildebrand, Don
C. Lawton, and Hans-Hendrik Westbroek, 1999, Seismic
characterization of impact craters: A summary. CREWES
Research Report. vol. 11, Chap 54. (Department of Geoscience,
University of Calgary)

http://www.crewes.org/ForOurSponsors/ResearchReports/1999/1999-54.pdf
http://www.crewes.org/ForOurSponsors/ResearchReports/reports.php?year=1999
http://www.crewes.org/ForOurSponsors/ResearchReports/abstract.php?file=/ForOurSponsors/ResearchReports/1999/1999-54.pdf

Westbroek, Hans-Henrik, and Robert R. Stewart, 1996, The
formation, morphology, and economic potential of meteorite
impact craters. CREWES Research Report. Chap. 34.
(Department of Geoscience, University of Calgary)

http://www.crewes.org/ForOurSponsors/ResearchReports/1996/1996-34.pdf
http://www.crewes.org/ForOurSponsors/ResearchReports/reports.php?year=1996
http://www.crewes.org/ForOurSponsors/ResearchReports/abstract.php?file=/ForOurSponsors/ResearchReports/1996/1996-34.pdf

Yours,

Paul H.

Friday, 7 August 2009

PDF Files of Meteorite Papers in Smithsonian Digital Repository

PDF Files of Meteorite Papers in Smithsonian Digital Repository

Paul bristolia at yahoo.com
Fri Aug 7 13:01:59 EDT 2009

Dear Friends,

There are a number of meteorite papers to be found in
the Smithsonian Digital Repository at:

http://si-pddr.si.edu/dspace/

For example, go look at:

http://si-pddr.si.edu/dspace/simple-search?query=Meteorite

Yours,

Paul H.

Meteoritewrongs and Fossil Footprintwrongs

Meteoritewrongs and Fossil Footprintwrongs

Paul bristolia at yahoo.com
Fri Aug 7 08:24:32 EDT 2009

Dear Friends,

Just as newspapers have a habit of reporting all sorts of fanciful and questionable
stories about meteoritewrongs, they also have a habit of reporting stories about
fossil “footprintwrongs” without really taking the time and trouble to verify their
validity. The latest pseudofossil to make the news comes from British

Mysterious footprint found in Hudson's Hope, Energeticcity.ca - ‎Aug 4, 2009‎

http://www.energeticcity.ca/fortstjohn/news/08/04/09/mysterious-footprint-found-hudsons-hope

Forgotten footstep? Prince George Citizen, August 5, 2009‎

http://www.princegeorgecitizen.com/20090805206197/local/news/forgotten-footstep.html

Did gardener find fossilized footprint? by Susan Lazaruk, The Province, August 7, 2009.

http://www.theprovince.com/technology/gardener+find+fossilized+footprint/1864762/story.html

http://a123.g.akamai.net/f/123/12465/1d/www.theprovince.com/technology/gardener+find+fossilized+footprint/1864762/1865689.bin

Is Bigfoot's footprint preserved in stone? Calgary Herald, August 6, 2009

http://www.calgaryherald.com/technology/Bigfoot+footprint+preserved+stone/1864077/story.html

The alleged footprint is just part of a rock that weathered and eroded faster than
the material surrounding it. This resulted in a depression that vaguely looks like a
footprint. It must have been a very slow news day.

Paleontologists and geologists are plagued with pseudofossils just as much as
people collecting and studying meteorites are plagued with meteorwrongs. Each
year, I get numerous ones. However, as they say, a person has kiss a lot of frogs
before they find either the prince or princess.

Best Regards,

Paul Heirnich

Wednesday, 5 August 2009

Bajada del Diablo impact crater-strewn field: Largest in South America

Bajada del Diablo impact crater-strewn field: Largest in South America

Paul bristolia at yahoo.com
Wed Aug 5 14:59:15 EDT 2009

Acevedo, R. D., J. F. Ponce, M. Rocca, J. Rabassa,and H. Corbella, 2009,
Bajada del Diablo impact crater-strewn field: The largest crater field in
the Southern Hemisphere. Geomorphology. vol. 110, no. 3-4, pp. 58-67.

http://dx.doi.org/10.1016/j.geomorph.2009.03.026
http://www.science-direct.com/science/journal/0169555X

Filu-Có plateau: the major impact crater field of Bajada del Diablo
strewnfield, Argentine Patagonia

http://www.conicet.gov.ar/scp/vista_resumen.php?produccion=273465&id=1907&keywords=
http://www.conicet.gov.ar/scp/vista_resumen.php?produccion=273465&id=1907&keywords=&printable=1

Yours,

Paul

Paper About proposed Impact Basin in Wilkes Land, Antarctica

Paper About proposed Impact Basin in Wilkes Land, Antarctica

Paul bristolia at yahoo.com
Wed Aug 5 08:16:42 EDT 2009

Dear friends,

I came across a new paper about the proposed 300 km in diameter
impact crater in Wilkes Land, Antarctica. It is:

von Frese, R. R. B., L. V. Potts, S. B. Wells, T. E. Leftwich, H. R. Kim, J. W.
Kim, A. V. Golynsky, O. Hernandez, and L. R. Gaya-Piqué (2009), GRACE
gravity evidence for an impact basin in Wilkes Land, Antarctica, Geochemistry
Geophysics Geosystems, 10, Q02014, doi:10.1029/2008GC002149.

http://www.agu.org/pubs/crossref/2009/2008GC002149.shtml

Yours,

Paul H.

Free PDF File of Paper About Proposed Wilkes Land, Antarctica, Impact Crater

Free PDF File of Paper About Proposed Wilkes Land, Antarctica, Impact Crater

Paul bristolia at yahoo.com
Wed Aug 5 08:34:19 EDT 2009

Dear friends,

In a previous message I wrote:

"I came across a new paper about the proposed 300 km
in diameter impact crater in Wilkes Land, Antarctica. It is:

von Frese, R. R. B., L. V. Potts, S. B. Wells, T. E. Leftwich, H. R. Kim, J. W.
Kim, A. V. Golynsky, O. Hernandez, and L. R. Gaya-Piqué (2009), GRACE
gravity evidence for an impact basin in Wilkes Land, Antarctica, Geochemistry
Geophysics Geosystems, 10, Q02014, doi:10.1029/2008GC002149.

http://www.agu.org/pubs/crossref/2009/2008GC002149.shtml "

While doing additional googling, I came across an URL where the PDF
file for this paper can be found. The PDF file for this paper can be
downloaded for free from:

http://www.geology.osu.edu/~vonfrese/general/WLIB_gcubed09.pdf

Yours,

Paul H.

Tuesday, 4 August 2009

Slope Streaks on Mars - Triggered by Small Meteorite Impacts ?

Slope Streaks on Mars - Triggered by Small Meteorite Impacts ?

Paul bristolia at yahoo.com
Tue Aug 4 23:06:46 EDT 2009

Slope Streaks on Mars - Featured images for August 2009

http://www.psi.edu/pgwg/images/aug09image.html

"Several of the streaks are triggered by impact craters
that have dark ejecta."

"Other interesting observations include triggering of
slope streaks by an impact crater, blast from an impact
explosion, or boulders rolling or bouncing downslope,
and formation of long linear ridges within the streak
that are parallel to its margins."

Yours,

Paul H.

Saturday, 1 August 2009

Meteorite Articles on Geology.com Web Site

Meteorite Articles on Geology.com Web Site

Paul bristolia at yahoo.com
Sat Aug 1 23:30:10 EDT 2009

What Are Meteorites

http://geology.com/meteorites/

Meteorite Types and Classification

http://geology.com/meteorites/meteorite-types-and-classification.shtml

Meteorite Identification

http://geology.com/meteorites/meteorite-identification.shtml

How Much Are Meteorites Worth?

http://geology.com/meteorites/value-of-meteorites.shtml

Iron Meteorites

http://geology.com/meteorites/iron-meteorites.shtml

and others listed at the bottom of

http://geology.com/meteorites/

Yours,

Paul H.

Crashing Comets Not Likely The Cause Of Earth's Mass Extinctions

Crashing Comets Not Likely The Cause Of Earth's Mass Extinctions

Paul bristolia at yahoo.com
Sat Aug 1 10:34:54 EDT 2009

Crashing Comets Not Likely The Cause Of Earth's Mass Extinctions

ScienceDaily (July 31, 2009) — Scientists have debated how many
mass extinction events in Earth's history were triggered by a space
body crashing into the planet's surface. Most agree that an asteroid
collision 65 million years ago brought an end to the age of dinosaurs,
but there is uncertainty about how many other extinctions might have
resulted from asteroid or comet collisions with Earth.

http://www.sciencedaily.com/releases/2009/07/090730141552.htm

Kaib, N. A., and T. Quinn, 2009, Reassessing the Source of
Long-Period Comets. Published online July 30 2009,
Science Express Reports DOI: 10.1126/science.1172676

http://www.sciencemag.org/cgi/content/abstract/1172676

Yours

Paul

P.s. Additional stuff about extraterrestrial platinum can be found at:

Extraterrestrial Platinum Was 'Stirred' Into Earth

ScienceDaily (Aug. 1, 2009) — A research program aimed at
using platinum as an exploration guide for nickel has for the
first time been able to put a time scale on the planet’s large-scale
convection processes.

http://www.sciencedaily.com/releases/2009/07/090731085813.htm

Maier, W. D., S. J. Barnes, I. H. Campbell, M. L. Fiorentini,
P. Peltonen, S.-J. Barnes, and R. H. Smithies, 2009, Progressive
mixing of meteoritic veneer into the early Earth's deep mantle.
Nature. vol. 460, no. 7255, pp. 62-623.

http://www.nature.com/nature/journal/v460/n7255/full/nature08205.html