Stalking the Wily Shattercone

Paul bristolia at yahoo.com
Fri Oct 13 14:05:35 EDT 2006

While browsing the Internet, I came across a paper, which provides
a very nice summary of the different criteria, which can be use to
authenticate a impact structure.

The paper is:

French, B. M., 2005, Stalking the Wily Shattercone: A Critical Guide for
Impact-Crater Hunters. Impacts in the Field. vol. 2 (Winter), pp. 3-10.

The Winter 2005 issue of "Impacts in the Field", which contains this
article can be downloaded from

http://web.eps.utk.edu/ifsg_files/newsletter/Winter_2005.pdf

links to other issues of "Impacts in the Field" can be found at:

http://web.eps.utk.edu/ifsg.htm

Best Regards,

Paul H.

Re: Egypt's Craters Pose Geological Riddle

Paul bristolia at yahoo.com
Mon Oct 9 14:10:02 EDT 2006

In “Egypt's Craters Pose Geological Riddle”, Ron
Baalke wrote:


> http://dsc.discovery.com/news/2006/10/06/crater_pla.html?category=travel&guid=20061006103030



> Egypt's Craters Pose Geological Riddle, Larry O'Hanlon

> Discovery News October 6, 2006


There are a number of links, which provided more detail
about this ongoing controversy. They are:

1. Remarks to the origin of the craters around Gilf
Kebir and Djebel Uweinat (Egypt)and the supposed
impact craters of Libya by Norbert Brugge, Germany,
2004, at

http://hometown.aol.de/SLVehicles4/Clayton%20Craters/Clayton-Craters.htm

2. di Martino, and others, 2006, Non-Impact Origin of
the Crater Field in the Gilf Kebir Region (SW Egypt).
European Space Agency First International Conference on
Impact Cratering in the Solar System ESTEC, Noordwijk,
The Netherlands, 08 - 12 May, 2006. The abstract can
be found at:

http://www.rssd.esa.int/SYS/docs/ll_transfers/296053_dimartino.pdf

and 3. The actual presentation of the above paper can
be found at

Non-impact origin of the crater field in the Gilf
Kebir region (SW Egypt) by M. Di Martino, L. Orti,
L. Matassoni, M. Morelli, R. Serra, and A. Buzzigoli.

The 3.3 MB PDF can be found file at:

http://www.rssd.esa.int/SYS/docs/ll_transfers/296053_Di2DMartino_pres.pdf

and in “40th ESLAB First International Conference on Impact
Cratering in the Solar System Agenda, Monday 8 May 2006 at:

http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=39029

On page 25 of the above PDF file, Di Martino and coauthors
dispute the impact origin of what has been called the “Kebira
crater” in Libya - Egypt.

Yours,

Paul H.

Kilmichael Structure, Mississippi, Revisited

Paul bristolia at yahoo.com
Tue Sep 26 21:23:49 EDT 2006

Tomorrow afternoon, David T. King of the Department of Geology,
Auburn University, Auburn, AL will talk recent research conducted
on the Kilmichael Structure, Mississippi, at this weeks Gulf Coast
Assicaition of Geological Societies 2006 Annual Meeting in
Lafayette, louisiana. The paper accompanying this talk is;

King, D. T., Jr., and L. W. Petruny, 2006, Cosmic impact in the coastal
plain of Mississippi? The Kilmichael structure. Gulf Coast Association
of Geological Societies Transactions, vol. 56, pp. 341-351.

Its abstract states:

"The Kilmichael structure, a probable impact crater in Montgomery
County, Mississippi, is a circular, structurally disturbed feature
possessing a diameter of approximately 5.6 mi. A refraction seismic
survey reveals subsurface characteristics of an impact structure,
including a central uplift, annular graben, and concentric inward-
dipping faults. A gravity profile like that of some confirmed impact
craters is present. In a key core hole at the structure’s center,
770 ft of section, consisting mainly of breccias and large intact
blocks, was penetrated and sampled. In this paper, we have
reinterpreted the sequence of drilled strata as follows (in reverse
stratigraphic order): (1) soil and colluvium; (2) post-impact
laminated marine sediments; (3) conglomeratic aqueouswashback
or resurge deposits of mixed provenance; (4) interbedded impact
breccias and target rock blocks, i.e., surgeback deposits; (5) large,
deformed and rotated blocks of the Upper Cretaceous Ripley
Formation; and (6) interbedded impact breccias and target rock
blocks, mainly Upper Cretaceous chalks. The stratigraphic age
of this structure is probably late early to early late Paleocene,
based on the fossil age of material from the youngest
recognizable intact block drilled in the key core hole. The
Kilmichael area was in a marginal marine to shallow marine setting
at the time of deformation and the drilled stratigraphy is consistent
with aqueous or “wet-target” impact."

Yours,

Paul

Eltanin Impact Area - A Few References - was "Eltanin - Part 2 of 2 "

Paul bristolia at yahoo.com
Thu Sep 7 09:52:05 EDT 2006

In the post "Eltanin - Part 2 of 2", bernd.pauli wrote:

"Bostwick J.A. et al. (1995) Asteroid sample return
mission II: Eltanin recovered (abs. Meteoritics 30, 490)"

A few of a number of other papers about the Eltanin
Impact Area are:

Kyte1, F. T., 2001, Chapter 9, Data Report: A Search
for Deposits of the Late Pliocene Impact of the Eltanin
Asteroid in Rise Sediments from the Antarctic Peninsula,
Site 1069. In Barker, P. F., Camerlenghi, A., Acton,
G. D., and Ramsay, A. T. S., eds., Proceedings of the
Ocean Drilling Program, Scientific Results. vol. 178

http://www-odp.tamu.edu/publications/178_SR/VOLUME/CHAPTERS/SR178_09.PDF

Kyte1, F. T., R. Gersonde, and G. Kuhn, 2005, Detailed
Results on the Analyses of the Eltanin Impact, Recovered
in Sediments Cores from Polarstern expedition
ANT-XVIII/5A. Lunar and Planetary Science XXXVI (2005)

http://www.lpi.usra.edu/meetings/lpsc2005/pdf/2129.pdf

Gersonde, R., and F. T. Kyte, 2001, Exploration of the
Eltanin Impact Area (Bellingshausen Sea): Expedition ANT
XVIII5a 64th Annual Meteoritical Society Meeting.

http://www.lpi.usra.edu/meetings/metsoc2001/pdf/5421.pdf

Gersonde, R., F. T. Kyte, U. Bleil, B. Diekmann, J. A.
Flores, K. Gohlk, G. Grahl, R. Hagen, G. Kuhn, F. J. Sierro,
D. Volker, A. Abelmann, and J .A. Bostwick, 1997, Geological
record and reconstruction of the late Plioceneimpact of
the Eltanin asteroid in the Southern Ocean. Nature.
vol. 390, pp. 357-363.

Gersonde1, R., F. T. Kyte, T. Frederichs, U. Bleil, and
G. Kuhn, 2003, New Data on the Late Pliocene Eltanin
Impact into the Deep Southern Ocean. Large Meteorite
Impacts 2003.

http://www.lpi.usra.edu/meetings/largeimpacts2003/pdf/4094.pdf
http://www.lpi.usra.edu/meetings/largeimpacts2003/pdf/sess06.pdf

Shuvalov, V. V., 2003, Numerical Modeling of the Eltanin
Impact. Lunar and Planetary Science XXXIV.

+++++ Volume 49, Number 6 (2002) of Deep Sea Research
Part II: Topical Studies in Oceanography +++++

This issue contains the following papers

1. Calcareous plankton stratigraphy around the Pliocene
"Eltanin" asteroid impact area (SE Pacific): documentation
and application for geological and paleoceanographic
reconstruction by J. A. Flores, F. J. Sierro, and R.
Gersonde, pp. 1011-1027.

2. Composition of impact melt debris from the Eltanin
impact strewn field, Bellingshausen Sea by F. T. Kyte,
pp. 1029-1047.

3. Iridium concentrations and abundances of meteoritic
ejecta from the Eltanin impact in sediment cores from
Polarstern expedition ANT XII/4 by F. T. Kyte,
pp. 1049-1061.

4. Unmelted meteoritic debris collected from Eltanin
ejecta in Polarstern cores from expedition ANT XII/4 by
F. T. Kyte, pp. 1063-1071.

5. Impact tsunami-Eltanin by S. N. Ward and E. Asphaug,
pp. 1073-1079(7)

+++++ Bathymetric Maps of the Eltanin Impact Area +++++

AWI Bathymetry & Geodesy - Eltanin Impact Survey: Analyses
of High Resolution Bathymetric Data in the Eltanin Impact
Area by Merijn J. Jacops at:

http://www.awi-bremerhaven.de/GEO/Bathymetry/eltanin/eltanin.html

The maps of the Eltanin Impact Area consist of:

1. Eltanin Impact Area at 57°25'00'' overview map, 1:200.000
- 4.0 MB PDF file available at;

http://www.awi-bremerhaven.de/GEO/Bathymetry/eltanin/eltanin_overview.pdf

2. Bathymetric chart Eltanin Impact Area northwest, 1:100.000,
sheet 1 - 2.6 MB Pdf file available at;

http://www.awi-bremerhaven.de/GEO/Bathymetry/eltanin/eltanin_1a.pdf

3. Bathymetric chart Eltanin Impact Area northeast, 1:100.000,
sheet 2 - 3.1 MB Pdf file available at;

http://www.awi-bremerhaven.de/GEO/Bathymetry/eltanin/eltanin_2a.pdf

4. Bathymetric chart Eltanin Impact Area southwest, 1:100.000,
sheet 3 - 5.7 MB Pdf file available at;

http://www.awi-bremerhaven.de/GEO/Bathymetry/eltanin/eltanin_3a.pdf

5. Bathymetric chart Eltanin Impact Area southeast, 1:100.000,
sheet 4 - 4.7 MB Pdf file available at;

http://www.awi-bremerhaven.de/GEO/Bathymetry/eltanin/eltanin_4a.pdf

Yours,

Paul

Re: Geological History of terrestrial "Olivine Bomb"?

Paul bristolia at yahoo.com
Mon Sep 4 19:39:16 EDT 2006

Gerald Flaherty wrote:

"I picked up an Olivine Bomb from Norbert and
Helke Kammel of "Rocks On Fire" a couple of
years ago when I knew less than I know now of
meteorites. It's Location is listed as Mt.
Shadwell, Victoria, Australia. At the time the
very word "olivine" immediately brought pallasite
to mind. I think I'd just invested in my first
Imilac. This piece is tantalizing in every way,
from is thick jet black volcanic crust, to its
beautifully polished green interior. Is this
terrestrial mantle tossed up in a violent
volcanic blast? Are these common?"

Technically speaking, they are not volcanic bombs, which are
thrown out of volcanoes during eruptions. Rather, they are
exotic chunks of rocks, called xenoliths, carried upward by
magma as it ascended through the crust. The best preserved
xenoliths are those carried up rapidly from deep in the
mantle by the formation of diatremes.

Mount Shadwell is the highest of a cluster of basaltic scoria
cones. It is well known as a source of olivine and augite
ultramafic xenoliths and clinopryoxene and orthoclase
megacrysts contained in basalts and scoria. My understanding
that although such xenoliths can be found in many basaltic
lavas, the ones found at Mount Shadwell are uncommon for
their size and preservation. The xenoliths found at Mt.
Shadwell are inferred to have come from both the lower
crust and upper mantle.

Some web pages:

1. Mount Shadwell - Victorian Resources Online
http://www.nre.vic.gov.au/dpi/vro/coranregn.nsf/pages/eruption_points_shadwell

2. Coexisting Andesitic and Carbonate Melts in a
Lherzolite Xenolith from Mt. Shadwell, Victoria

http://www.es.mq.edu.au/geology/MNAGC98.html
http://www.es.mq.edu.au/geology/MNHP.html

3. Melting and Metasomatism in the Lithospheric Mantle Beneath
SE Australia: Trace Element Studies by Laser Microprobe by
Marc Norman and Suzanne O'Reilly

http://www.es.mq.edu.au/GEMOC/annrep97/abs96/Norm396.htm

4. Roach, I. C., 2004, Mineralogy, Textures and P-T
Relationships of a Suite of Xenoliths from the Monaro
Volcanic Province, New South Wales, Australia. Journal of
Petrology. vol. 45, no. 4, pp. 739-758.

http://petrology.oxfordjournals.org/cgi/content/abstract/45/4/739

5. Ellis. D. J., 1976, High pressure cognate inclusions
in the Newer Volcanics of Victoria. Contributions to
Mineralogy and Petrology. vol. 58, no. 2, pp. 149-180.

http://www.springerlink.com/content/r02x704tlm23w415/

6. Xenolith

http://en.wikipedia.org/wiki/Xenolith

Yours,

Paul H.

Re: Discovery of a huge impact site in East Jordan

Paul bristolia at yahoo.com
Wed Aug 30 11:03:32 EDT 2006

drtanuki (Dirk) wrote:
“Stefan and List,
Thank you Stefan! That is virtually what I have.
The Google coordinates I have been studying for
almost three months are 31.025349N,36.482491E
measured at the centre of the crater. The diameter
that I get using the google measure is 5.8Km
for the outer ring. The central uplift I have not
measured.”

I was looking at the 1968 El Azraq Sheet for the 1:250, 000
scale “Geologische Karte von Jordanien” (Geological map
of Jordan), Deutsche Geologische Mission in Jordanien) :
Hanover, Federal Republic of Germany. This geologic map
clearly shows a very well defined circular uplift of
Cretaceous marls, bituminous limestones, cherts, dolomites,
and so forth surrounded by Eocene to Paleocene cherty
limestones, marls, and nummulitic limestones at the precise
center of the proposed East Jordan impact site. In addition,
the same map shows a quite well developed ring of faults,
which completely and almost perfectly surrounding the
circular uplift of Cretaceous strata within the Paleogene
carbonates. As shown in this map, this feature certainly
looks like an impact structure. I guess in the late 1960’s,
geologists had not yet started thinking in terms of impact
structures.

Paul H.

Online Guidebook for the Middlesboro Impact Crater

Paul bristolia at yahoo.com
Wed Aug 30 09:59:26 EDT 2006

A field trip guidebook to the Middlesboro impact
crater can be downloaded from the Kentucky
Geological Survey "Field Trips" web page at:

http://www.kspg.org/pages/fieldtrips.html

The guide to the Middlesboro impact crater is part
of "Geologic Impacts on the History and Development
of Middlesboro, Kentucky. Year 2003 Annual Field
Conference of the KSPG". The 5.3MB PDF file can be
downloaded from:

http://www.kspg.org/pdf/03fieldguide.pdf

The "Field Guide to the Middlesboro Impact
Structure and Beyond by Keith A. Milam and
Kenneth W. Kuehn can be found on pages 30-44
of the above guidebook. This impact crater
is also discussed in "Mining and Construction
Obstacles in the Middlesboro Basin, Kentucky
by Stephen F. Greb, pp. 17-22, and An
Introduction to Impact Cratering by Keith A.
Milam, pp. 23-29 of "Geologic Impacts on the
History and Development of Middlesboro,
Kentucky”.

Yours,

Paul H.

Missouri Impact Craters Guidebooks Now Online as PDF Files

Paul bristolia at yahoo.com
Wed Aug 30 09:37:43 EDT 2006

The field trips guidebooks for the May 21-23, 2005
conference, The Sedimentary Record of Meteorite
Impacts in Springfield, Missouri can be downloaded
as PDF files online. The two guidebooks are:

Field Trip 1: Geology of the Weaubleau-Osceola
Structure, Southwestern Missouri, Sunday, May 22,
2005 by Kevin R. Evans, James F. Miller, and
George H. Davis

and Field Trip 2: Geology of the Decaturville and
Crooked Creek Structures, Southern Missouri,
Monday, May 23, 2005 by Patrick S. Mulvany, Kevin
R. Evans, and George H. Davis.

They can downloaded as a single 2.6 MB PDF file from:

http://geosciences.missouristate.edu/geology/SEPMRC/SEPMRC_guidebook.pdf

The link to this guidebook is "Download the Field Trips
Guidebook (pdf)”, which is found on the “SEPM Research
Conference, The Sedimentary Record of Meteorite
Impacts” web page at:

http://geosciences.missouristate.edu/geology/SEPMRC/conference.html

Another guidebook to the geology of the Weaubleau-
Osceola Structure is;

Evans, Kevin R.; Mickus, Kevin L.; & Rovey, Charles
W. III, 2003, The Weaubleau Structure: Evidence of
a Mississippian Meteorite Impact in Southwestern
Missouri. Association of Missouri Geologists Field
Trip Guidebook, 50th Annual Meeting. Missouri
Department of Natural Resources.

This 3.8 MB PDF file of this guidebook can be
downloaded from:

http://geosciences.missouristate.edu/geology/RI-75(2003AMGguidebook).pdf

The link to this PDF file can be found in "RECENT
FIELD TRIPS" web page as "Guidebook Published by
Missouri Geological Survey for the 2002 Meeting of
the Association of Missouri Geologists (PDF*)" at;

http://geosciences.missouristate.edu/Fieldtrips.htm

A link to web pages showing images of the Ries impact
crater are also found on the same web page. The URL
for this web page is:

http://geosciences.missouristate.edu/geology/FieldTrips/Ries/default.html

Best Regards,

Paul H.

Wethersfield Meteorites was "Question"

Paul bristolia at yahoo.com
Tue Aug 29 10:11:50 EDT 2006

Michael L Blood asked:

"In 1971 a meteorite struck a hous in
Wethersfield,Conn. As if that weren't
enough, ANOTHER meteorite struck
another house in that small town in 1982!
I'm stoked. However, I have NEVER
seen either of these falls available for
sale. Has ANYONE on the list seen either/
both of these falls available for sale?
Anyone have any?"

The main mass of the 1982 fall is in the Peabody
Museum of Natural History as noted in The Wethersfield
Meteorite, Meteorites and Planetary Science, Peabody
Museum of Natural History at:

http://www.yale.edu/peabody/collections/met/index.html

There was only 52 grams of fragments, which broke off of
the 2.756 kg main mass. I suspect that these were consumed
in the studies of the meteorite mentioned in the above
article.

The 1971 meteorite is owned by the Division of Meteorites
of the Smithsonian Institution in Washington. From what I
found, there was only a main mass of 350 grams, which the
Smithsonian now has.

Yours,

Paul H.

Martian Sedimentary Meteorites

Paul bristolia at yahoo.com
Wed Jul 12 23:14:27 EDT 2006

Ashley, Gail M. and Delaney, Jeremy S, 1999, If a meteorite of
Martian sandstone hit you on the head would you recognize it?
1999, Lunar and Planetary Science XXX, abstarct no. 1273

http://www.lpi.usra.edu/meetings/LPSC99/pdf/1273.pdf

Metal Detectors was " Even more of that darned Brenham"

Paul bristolia at yahoo.com
Tue Jul 4 16:09:50 EDT 2006

Mr. Garrison wrote:


>A rotted/"puzzle piece" new main mass? Photo on site

> http://www.kansas.com/mld/kansas/14956160.htm


What type of metal detector would a person use to look for
buried, badly rusted meteorites??

How does a person calibrate it to sense pieces of meteorite
somehwat smaller than found above?

Are there any web pages on using metal detectors to look
for buried meteorites?

Yours,

Paul

Old Italian Lithograph of Japanese Fall

Paul bristolia at yahoo.com
Fri Jun 30 17:12:57 EDT 2006

Metorman46 at aol.com wrote:


>Jeff; I have to wonder about the report of a tsunami

>associated with this March 16 fall.If the report is true

>and or verified by research in japan that would be

>amazing.To generate a tsunami the bolide had to

>strike the sea,as you know.Japan was in a state of

>limbo at this time in history after the II world war

>and being occupied by allied forces.News about a

>bolide probably wasn't spread around very much

>because of that situation.I would venture to

>guess that a local record exists somewhere that

>would shed more light on this event. Maybe

>someone in japan could research the matter.

>

>To me ,this is intrigueing and could lead somewhere

>or not if checked out.TSUNAMI,TSUNAMI.that is the

>key,i think. Interesting topic Jeff.


I checked with the Pacific Tsunami Warning Center. It
turns out that although there is no catalogue of Russian
tsunamis in Soviet times, the Japanese kept and still
keep a very detailed catalogue listing all of the
tsunamis that hit Japan each year. The Japanese kept
very exact and detailed records, even in 1947, of the
tsunamis, which hit their coasts. For example, they
found a record of a small tsunami that hit Japan on
November 4, 1947. It was associated with an
earthquake off the west coast of Hokkaido.

However, the Japanese catalogue lists nothing for either
February 12, 1947 or the months on either side of it. In
the japanese and other tsunamis catalogues, there
exist “orphan” tsunamis, whose source is unknown. If
you are looking for meteorite impact tsunamis, these
are the ones to be investigated ion some manner.

Best Regards,

Paul H.

Online Publication About Hypothesized Iraqi Impact Structure

Paul bristolia at yahoo.com
Mon Jun 26 12:25:09 EDT 2006

The PDF version of a publication on the hypothesized Iraqi Impact
Crater is available online. The paper is:

Master, S. and Woldai, T. (2004) The UMM Al Binni structure in the
Mesopotamian marshlands of Southern Iraq, as a postulated late
holocene meteorite impact crater : geological setting and new
LANDSAT ETM + and Aster satellite imagery. Johannesburg,
University of Witwatersrand, Economic Geology Research Institute
(EGRI), 2004. EGRI - HALL : information circular 382, 21 p.

It can be downloaded from a link at:

http://www.itc.nl/about_itc/resumes/woldai.aspx and

http://www.itc.nl/library/Academic_output/2004/Technical_report_2004.asp

The 2 MB PDF file of it can be downloaded directly from:

http://www.itc.nl/library/Papers_2004/tech_rep/woldai_umm.pdf

Yours,

Paul H.

Re: Does a Giant Crater Lie Beneach the Antarctic Ice?

Paul bristolia at yahoo.com
Tue Jun 6 13:08:13 EDT 2006

On June 4, 2006, Ron Baalke quoted

“http://www.nature.com/news/2006/060529/full/060529-11.html

Does a giant crater lie beneath the Antarctic ice?
Signs of an ancient impact could help to explain a mass
extinction. by Mark Peplow, nature.com,June 2, 2006"

In part, the article stated:

“An impact of that size should also have melted and
twisted nearby rock. Yet rocks in the Transantarctic
Mountains of the same age show no evidence of the
collision, says Jane Francis, a geologist also at the
University of Leeds. "That sequence has been worked
on before, and no one has found evidence to support
a massive impact like this," she says.”

This is an excellent point as there are complete stratigraphic
sections across the Permian-Triassic boundary exposed in
the Transantarctic Mountains and undisputed impact ejecta
and other evidence of a nearby impact of such a size is
completely lacking. The reports of shocked quartz from
these outcrops have been retracted and the reports of helium-
filled fullerenes, meteorite fragments, and other impact-
related debris are highly disputed. A full description of the
Permian-Triassic boundary and a discussion of the impact
ejecta reported from it can be found in:

Collinson, J. W., Hammer, W. R., Askin, R. A., and Elliot,
D. E., 2006, Permian-Triassic boundary in the central
Transantarctic Mountains, Antarctica. Geological Society
of America Bulletin. vol. 118, no. 5, pp. 747–763.
doi: 10.1130/B25739.1

http://www.gsajournals.org/gsaonline/?request=get-abstract&doi=10.1130%2FB25739.1

Yours,

Paul

Free Online Topographic Maps of Various Countries

Paul bristolia at yahoo.com
Sat Jun 10 01:44:05 EDT 2006

Scanned images of Russian topographic maps (at scales from 1:10,000 to
1:5,000,000, but mostly 1:100,000 and 1:200,000) of a wide variety of
countries, including Africa, Albania, Liybia, China, Australia, Greece, India,
Indonesia, and so forth are available free of charge at:

http://mapy.mk.cvut.cz/data/

Yours,

Paul

Football-Size Rock Crashes Through Roof and Lodges in Wall in Nevada

Paul bristolia at yahoo.com
Thu May 25 13:19:50 EDT 2006

'A LOT OF FORCE': Mystery object hits center
Substance to be sent to UNLV for analysis
By K.C. HOWARD, REVIEW-JOURNAL, Las Vegas
http://www.reviewjournal.com/lvrj_home/2006/May-24-Wed-2006/news/7572899.html

"On Saturday night, an unidentified object was sent hurtling
through the roof at Steven Gleicher's workplace.

Was the football-sized object a meteor or perhaps something
more common?

And perhaps just as puzzling: How could it rip through a thick pane
of fiberglass strong enough to hold a human being and then embed
itself into a wall?

"It could just be a large piece of asphalt because it is grey on the
outside and black in the middle," said Gleicher, an administrator
at Diagnostic Imaging Southern Nevada, at 3560 E. Flamingo Road,
near Pecos Road."

..... rest of article deleted....

Scientists Look to Moon for Signs of Early Earth Life

Paul bristolia at yahoo.com
Wed May 17 14:33:49 EDT 2006

Scientists Look to Moon for Signs of Early Earth Life by Robert Krulwich
http://www.npr.org/templates/story/story.php?storyId=5410577

"Morning Edition, May 17, 2006 · The first life on earth would
have left traces in our planet's infant rocks. But those early
layers have since been squeezed and heated out of all
recognition. Some researchers say we should look for
evidence of the earliest life on earth in rocks on the moon."

Meteorite Fragment Found in Morokweng Crater Impact Melt

Paul bristolia at yahoo.com
Wed May 10 17:23:59 EDT 2006

Maier, W. D., M. A. G. Andreoli, I. McDonald, M. D. Higgins, A. J. Boyce, A.
Shukolyukov, G. W. Lugmair, L. D. Ashwal, P. Graser, E. M. Ripley, and R. J.
Hart, 2006, Discovery of a 25-cm asteroid clast in the giant Morokweng
impact crater, South Africa. Nature. vol. 441, no. 4751, pp. 203-206.

http://www.nature.com/nature/journal/v441/n7090/abs/nature04751.html

Fragment of an LL6 chondrite breccia found impact melt of 70 km
diameter crater in South Africa.

Information about the Morokweng Impact Crater can be found at:

http://www.unb.ca/passc/ImpactDatabase/images/morokweng.htm

Middle Stone Age Impact Identified in Western Desert, Egypt

Paul bristolia at yahoo.com
Sat May 6 21:44:25 EDT 2006

Some archeologists and geologists have published research about
a Middle Stone Age meteorite impact, which occurred in the Western
Desert of Egypt.

Haldemann, A.F.C., M.R. Kleindienst, C.S. Churcher, J.R. Smith, H.P.
Schwarcz, K. Markham, and G. Osinski, 2005, [17.03] Mapping
Impact Modified Sediments: Subtle Remote-Sensing Signatures of
the Dakhleh Oasis Catastrophic Event, Western Desert, Egypt.
Session 17 Dust, Impacts and Earth Atmosphere, 37th AAS Division
for Planetary Sciences Meeting, 31st AAS Historical Astronomy
Division Meeting and the Royal Astronomical Society, 4-9
September 2005, University of Cambridge, UK.

http://www.aas.org/publications/baas/v37n3/dps2005/427.htm

"Ca-Al rich glass (Dakhleh Glass) points to a catastrophic event
between c. 100,000 - 200,000 years ago in this well-studied
African savannah and freshwater lake, Middle Stone Age
environment."

++++

A.F.C. Haldemann, M.R. Kleindienst, C.S. Churcher, J.R. Smith,
H.P. Schwarcz, and G. Osinski, 2005, Volatiles in the Desert:
Subtle Remote-Sensing Signatures of the Dakhleh Oasis
Catastrophic Event, Western Desert, Egypt. Role of Volatiles
and Atmospheres on Martian Impact Craters 2005 Meeting, Lunar
and Planetary Institute, Houston, Texas.

http://www.lpi.usra.edu/meetings/volatiles2005/pdf/3038.pdf

++++

Haldemann, A. F. C., M. R. Kleindienst, C. S. Churcher, J. R. Smith,
H. P. Schwarcz and G. R. Osinski, 2005, Mapping impact modified
sediments: subtle remote-sensing signatures of the Dakhleh Oasis
Catastrophic Event, Western Desert, Egypt. The Sedimentary
Record of Meteorite ImpactsMeeting , Society for Sedimentary
Geology, Springfield, Missouri.

http://geosciences.missouristate.edu/geology/SEPMRC/SEPMRC_program.pdf

"Bracketing by archaeological remains confirms the chronometric
date obtained on the glass of 122,000 ± 40,000 yrs for the
heating event--during the Middle Stone Age occupations of the
oasis area"

Paul H.

Google Earth (Map) Question was "New Impact Structures"

Paul bristolia at yahoo.com
Fri May 5 14:35:19 EDT 2006

Jeff Kuyken wrote:

"Or click here for a pic for those of you without Google Earth, etc"

When using Google Earth or Google Maps, is there some
way of finding out what the metadata, i.e. source, date, kind,
resolution, etc., of the imagery for the area being viewed?

Best regards,

Paul