Geology of Lonar Crater, India (With Link to PDF File of Paper)

Paul bristolia at yahoo.com
Fri Oct 2 18:17:01 EDT 2009

Maloof, A. C., S. T. Stewart, B. P. Weiss, S. A. Soule,
N. L. Swanson-Hysell, K. L. Louzada, I. Garrick-Bethell,
and P. M. Poussart. Geology of Lonar Crater, India
Geological Society of America Bulletin. Published Online
September 25, 2009, doi:10.1130/B26474.1

http://gsabulletin.gsapubs.org/content/early/2009/09/24/B26474.1.abstract

PDF file at:

http://web.mit.edu/iang/www/pubs/Lonar_Geology_Preprint_GSABull_submitted_2008.pdf
http://www.fas.harvard.edu/~planets/louzada/page%202.html

Auxillary Materials at:

http://www.fas.harvard.edu/~planets/sstewart/reprints/papers/27_Maloof_et_al_Geology_Lonar_Crater_GSA_Bull_inpress_2009_DR.pdf
http://www.fas.harvard.edu/~planets/louzada/page%202.html

DEM file of crater at:

http://www.fas.harvard.edu/~planets/sstewart/reprints/papers/lonar-dem.zip
http://www.fas.harvard.edu/~planets/louzada/page%202.html

Yours,

Paul H.

The Sudbury impact layer in the Paleoproterozoic of northern Michigan, USA

Paul bristolia at yahoo.com
Fri Oct 2 18:06:21 EDT 2009

Cannon, W. F., K. J. Schulz, J. Wright Horton, Jr., and
David A. Kring, 2009, The Sudbury impact layer in the
Paleoproterozoic iron ranges of northern Michigan, USA.
Geological Society of America Bulletin. Ahead of Print,
September 25, 2009

http://gsabulletin.gsapubs.org/content/early/2009/09/24/B26517.1.abstract

Pufahl, P. K., Eric E. Hiatt, Clifford R. Stanley, Jared
R. Morrow, Gabriel J. Nelson, and Cole T. Edwards, 2009,
Physical and chemical evidence of the 1850 Ma Sudbury
impact event in the Baraga Group, Michigan, Geology.
vol. 35, no. 9, pp. 827-830.

http://geology.geoscienceworld.org/cgi/content/abstract/35/9/827

http://www.uwosh.edu/faculty_staff/hiatt/Research/Early_ocean/Pufahl_Ejecta_9_07.pdf
http://www.uwosh.edu/faculty_staff/hiatt/Research/Early_oceans.html

Yours,

Paul H.

Siberian volcanism 'wiped out world's forests' 250m years ago

Paul bristolia at yahoo.com
Fri Oct 2 17:54:31 EDT 2009

Siberian volcano 'wiped out world's forests' 250m years ago
A huge Siberian volcano destroyed the world's forests 250
million years ago in what scientists say was the worst extinction
event the planet has ever witnessed, new research has disclosed.
Telegraph, UK,

http://www.telegraph.co.uk/science/science-news/6253147/Siberian-volcano-wiped-out-worlds-forests-250m-years-ago.html

Sephton, M. A., H. Visscher, C. V. Looy, A. B. Verchovsky,and J. S.
Watson, 2009, Chemical constitution of a Permian-Triassic disaster
species. Geology. vol. 37, pp. 875-878, doi:10.1130/G30096A.1

http://geology.gsapubs.org/content/37/10/875.abstract

Yours,

Paul H.

Start of Quaternary Period - Pleistocene Epoch Now 2.58 Million Years Ago

Paul bristolia at yahoo.com
Tue Sep 29 13:56:26 EDT 2009

End of an Era: New Ruling Decides the Boundaries of Earth's
History, September 22, 2009

http://www.physorg.com/news172824857.html

After decades of debate and four years of investigation an
international body of earth scientists has formally agreed
to move the boundary dates for the prehistoric Quaternary
age by 800,000 years, reports the Journal of Quaternary
Science.

The paper is:

Gibbard et al., 2009, Formal ratification of the Quaternary
System/Period and the Pleistocene Series/Epoch with a
base at 2.58 Ma. Journal of Quaternary Science.

http://www3.interscience.wiley.com/journal/122602421/abstract

Yours,

Paul H.

Japanese Lunar Mission Provides Data About Moon's Origin

Paul bristolia at yahoo.com
Tue Sep 15 09:06:45 EDT 2009

Japanese Lunar Mission Provides a Glimpse at How the
Moon Took Shape by Naiomi Solomom, September 11, 2009
Ethiopian Review.

http://www.ethiopianreview.com/scitech/

Japanese Lunar Mission Provides a Glimpse at How the
Moon Took Shape. Data from the recently retired Kaguya
spacecraft support the notion that the moon's crust
congealed from an ocean of magma by John Matson,
Scientific American,

http://www.scientificamerican.com/article.cfm?id=moon-magma-ocean

The paper is:

Ohtake, M. T. Matsunaga, J. Haruyama, Y. Yokota, T.
Morota, C. Honda, Y. Ogawa, M. Torii, H. Miyamoto, T.
Arai, N. Hirata, A. Iwasaki, R. Nakamura, T. Hiroi,
T. Sugihara, H. Takeda1, H. Otake, C. M. Pieters, K.
Saiki, K. Kitazato, M. Abe, N. Asada, H. Demura, Y.
Yamaguchi, S. Sasaki1, S. Kodama, J. Terazono, M.
Shirao, A. Yamaji, S. Minami, H. Akiyama and J.-L.
Josset, 2009, The global distribution of pure
anorthosite on the Moon. Nature. vol. 461, no. 7261,
pp. 236-240 doi:10.1038/nature08317

http://www.nature.com/nature/journal/v461/n7261/abs/nature08317.html

Yours,

Paul H.

Katsuhito Ohtsuka, Japan in News!!!!

Paul bristolia at yahoo.com
Mon Sep 14 22:39:56 EDT 2009

Dirk Ross wrote:

"Dear List and Katsuhito,

Great Work!!!! Congrats!! http://lunarmeteoritehunters.blogspot.com/

Jupiter Turned Comet Into "Moon" for 12 Years

National Geographic

http://news.nationalgeographic.com/news/2009/09/090914-jupiter-moon-comet.html "

The paper about it is:

Ohtsuka, K., T. Ito, M. Yoshikawa, D. J. Asher, H. Arakida,
2009, Quasi-Hilda Comet 147P/Kushida-Muramatsu: Another
long temporary satellite capture by Jupiter. arXiv:0808.2277v1
[astro-ph],

http://arxiv.org/abs/0808.2277

Another article:

Jupiter captures a comet, briefly, Christian Science Monitor
by Pete Spotts

http://features.csmonitor.com/discoveries/2009/09/14/jupiter-captures-a-comet-briefly/

Captured comet becomes moon of Jupiter by Kerensa McElroy, Cosmos Online

http://www.cosmosmagazine.com/news/3003/captured-comet-becomes-moon-jupiter

Yours,

Paul H.

Younger Dryas Impact hypothesis GSA and AGU Abstracts

Paul bristolia at yahoo.com
Sun Sep 13 07:59:56 EDT 2009

The GSA abstracts can be found in "T94. Impact Cratering
from the Microscopic to the Planetary Scale II (GSA
Planetary Geology Division; International Continental
Scientific Drilling Program [ICDP]; GSA Sedimentary
Geology Division; GSA Structural Geology and Tectonics
Division; GSA Geophysics Division; Paleontological
Society; GSA International Division) at

http://gsa.confex.com/gsa/2009AM/finalprogram/session_25177.htm

The abstracts are;

1. Dryas. Pinter, N., A. C. Andrew, and D. Ebel, 2009,
Extraterrestrial and Terrestrial Signatures at the Onset of
the Younger Geological Society of America Abstracts with
Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_162563.htm

2. Holliday, V. T., and D. J. Meltzer, 2009, Geoarchaeology
of the 12.9ka Impact hypothesis. Geological Society of
America Abstracts with Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_160959.htm

3. Paquay, F., S. Goderis, G. Ravizza, and P. Claeys, 2009, No
evidence of of extraterrestrial geochemical components at the
Bolling-Allerod/Younger Dryas Transition. Geological Society
of America Abstracts with Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_163154.htm

4. Surovell, T. A., and V. T. Holliday, 2009, Non-
Reproducibility of Younger Dryas Extraterrestrial Impact
Results. Geological Society of America Abstracts with
Programs.

http://gsa.confex.com/gsa/2009AM/finalprogram/abstract_163912.htm

PDF files of various papers by Dr. V. T. Holliday can be
found beneath "Publications of Vance T. Holliday" at:

http://www.argonaut.arizona.edu/holliday.htm

This includes:

Vance T. Holliday, David A. Kring, James H. Mayer, and Ronald J.
Goble, Age and effects of the Odessa meteorite impact, western Texas,
USA. Geology. vol. 33, pp. 945-947. at:

http://www.argonaut.arizona.edu/articles/holliday_etal2005.pdf

The Abstracts to the 2009 American Geophysical Union
presentations for "PP15: Younger Dryas Boundary:
Extraterrestrial Impact or Not?" have not been posted
yet. Eventually, they should appear at

http://www.agu.org/meetings/fm09/program/scientific_session_search.php?show=detail&sessid=388

According to George Howard, http://www.georgehoward.net/clovis_comet_at_fall_2009_agu.htm ,
the titles of the accepted papers are:

1. Lost Impacts

2. High resolution Osmium isotopes in deep-sea ferromanganese crusts reveal a large meteorite impact in the Central Pacific at 12.4 ka

3. What Caused the Younger Dryas? An Assessment of Existing Hypotheses

4. An Independent Evaluation of the Younger Dryas Extraterrestrial Impact Hypothesis

5. Cosmic impact: What are the odds?

6. Cometary airbursts and atmospheric chemistry: Tunguska and a candidate Younger Dryas event

7. Problems with the Younger Dryas Boundary ( YDB ) Impact Hypothesis

8. Beringian Megafaunal Extinctions at ~37 ka B.P.: Do Micrometeorites Embedded in Fossil Tusks and Skulls Indicate an Extraterrestial Precursor to the Younger Dryas Event?

9. Airbursts in the Sky with Diamonds? Shock Limits to a Younger Dryas Impact.

10. The platinum group metals in Younger Dryas Horizons are terrestrial

11. Putting the Younger Dryas Cold Event into Context

12. Field-Analytical approach of land-sea records for elucidating the Younger Dryas Boundary syndrome

13 Evidence of four prehistoric supernovae <250
parsecs from Earth during the past 50,000 years

14. Oblique impacts into low impedance layers

15. Cold Climate Related Structural Sinks Accommodate Unusual Soil Constituents, Pinelands National Reserve, New Jersey, USA.

16. Positive anomaly in platinum group elements and the presence of shocked diamonds: Two question marks at the Younger Dryas

17. Nanodiamonds and Carbon Spherules from Tunguska, the K/T Boundary, and the Younger Dryas Boundary Layer

18. Are Nanodiamonds Evidence for a Younger Dryas impact Event?

19. Rockyhock and Kimbel Carolina Bays: Extraterrestrial Impact or Terrestrial Genesis?

20. No support from osmium isotopes for an impact event at the Bolling-Allerod/Younger Dryas transition

21. Climatic Control of Biomass Burning During the Last Glacial-Interglacial Transition

22. Human Population Decline in North America during the Younger Dryas

23. Summary of impact markers and potential impact mechanisms for the YDB impact event at 12.9 ka

24. Testing Younger Dryas ET Impact ( YDB ) Evidence at Hall’s Cave, Texas

25. Wildfires, Soot and Fullerenes in the 12,900 ka Younger Dryas boundary layer in North America.

Obviously, the discussion about the Younger Dryas Impact Hypothesis continues.

Yours,

Paul H.

Christian Koeberl's List of Publications (Lots of PDF Files)

Paul bristolia at yahoo.com
Wed Sep 2 13:52:12 EDT 2009

Christian Koeberl's List of Publications

http://www.univie.ac.at/geochemistry/koeberl/publikation_list/

Lots of PDF files of very interesting papers by Dr. Christian
Koeberl to be downloaded from the above web page.

Yours,

Paul H.

Mount Wilson Observatory threatened by Los Angeles wildfires

Paul bristolia at yahoo.com
Tue Sep 1 08:40:29 EDT 2009

Mount Wilson Observatory threatened by Los Angeles wildfires, Times Online

http://timesonline.typepad.com/science/2009/09/mount-wilson-observatory-threatened-by-california-wildfires.html

Mount Wilson Observatory Towercam

http://www.astro.ucla.edu/~obs/towercam.htm

Mount Wilson Observatory: waiting out the California Station wildfire Space
News Examiner, September 1, 2009

http://www.examiner.com/x-504-Space-News-Examiner~y2009m9d1-Mount-Wilson-Observatory-waiting-out-the-California-Station-wildfire

Yours,

Paul H.

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.

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

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.

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

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

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

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

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.

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.

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

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