Recently Published Papers on Impact Structures and Impactites

Paul
Sun Feb 15 23:11:48 EST 2009

Dear Friends,

Below are some recent papers about impact structures and
alleged impactites that have appeared.

1. Schmieder, M., E. Buchner, and D. P. LeHeron, 2009, The Jebel
Hadid structure (Al Kufrah Basin ,SE Libya)—A possible impact
structure and potential hydrocarbon trap? Marine and Petroleum
Geology. vol 26. no. 3, pp. 310-318. doi:10.1016/j.marpetgeo.2008.04.003

http://dx.doi.org/10.1016/j.marpetgeo.2008.04.003

The Jebel Hadid structure is formed in the Nubian Sandstone and
located in southern Al Kufrah Basin. It is a 4.7 km circular
feature with a set of multiple concentric annular ridges. they
suggest "that the Jebel Hadid structure might represent an
eroded, complex impact structure' much like the Tin Bider
structure in Algeria. Its location is 20º 52' N and 22º 42' E).

2. Ghoneim, E. M., 2008, Ibn-Batutah: A possible simple impact
structure in southeastern Libya, a remote sensing study.
Geomorphology. vol. 103, no. 3, pp. 341-350.

The Ibn-Batutah feature is a circular structure centered on
21° 34′ 10″ N and 20° 50′ 15″ E and located in southeastern
Libya. It is formed in Nubian Sandstone.

http://dx.doi.org/10.1016/j.geomorph.2008.07.005
http://www.bu.edu/remotesensing/faculty/research/ghoneim/index.html

3. McCall, G. J. H., 2009, Half a century of progress in research
on terrestrial impact structures: A review. Earth-Science Reviews.
vol 92, no. 3-4, pp. 99-116.

http://dx.doi.org/10.1016/j.earscirev.2008.11.004

4. McCall, G. J. H., in press, The Carbonado diamond conundrum
Earth-Science Reviews, In Press, Accepted Manuscript, Available
online 13 February 2009. doi:10.1016/j.earscirev.2009.01.002

http://dx.doi.org/10.1016/j.earscirev.2009.01.002

"The reviewer presents the results of a literature search on the
enigmatic occurrences of carbonado; a form (but not the only
form) of polycrystalline diamond, which is mined for industrial
diamonds."

He hypothesizes that "carbonado does stem from terrestrial
eruptive processes" and concludes that much research remains
to be performed before any conclusions can be reached.

5. Schmieder, M., and E. Buchner, 2007, Short note: The Faya
basin (N Chad, Africa) – A possible impact structure? Journal
of African Earth Sciences. vol. 47, pp. 62–68.

The Faya basin is an almost circular structure, centered on
18º 10' N and 19º 34' E. It lies about 55 km ENE of the city
of Faya (Largeau) and has a diameter of about 2 km."

http://dx.doi.org/10.1016/j.jafrearsci.2006.11.004
http://adsabs.harvard.edu/abs/2007JAfES..47...62S

Yours,

Paul

Life forms May Have Evolved In Ancient Hot Springs On Mars

Paul
Thu Feb 12 15:12:21 EST 2009

Life forms May Have Evolved In Ancient Hot Springs On Mars
Science Daily, Feb. 12, 2009

http://www.sciencedaily.com/releases/2009/02/090212112829.htm

Evidence of Ancient Hot Springs on Mars Detailed in
Astrobiology Journal, Vicki Cohn, Mary Ann Liebert,
Inc. publishers

http://www.liebertpub.com/prdetails.aspx?pr_id=693

Allen C. C., and D. Z. Oehler, in press, A Case for
Ancient Springs in Arabia Terra, Mars. Astrobiology.

PDF file can be found at

http://www.liebertonline.com/doi/pdfplus/10.1089/ast.2008.0239

Yours,

Paul H.

A Martian Giant's Causeway (Columnar Basalt Observed on Mars)

Paul
Thu Feb 12 15:11:29 EST 2009

A Martian Giant's Causeway by Chris Rowan
February 11, 2009, A Martian Giant's Causeway

http://scienceblogs.com/highlyallochthonous/2009/02/a_martian_giants_causeway.php?utm_source=sbhomepage&utm_medium=link&utm_content=channellink

Milazzo, M. P., L.P. Keszthelyi, W.L. Jaeger,
M. Rosiek, S. Mattson, C. Verba, R.A. Beyer,
P.E. Geissler, A.S. McEwen, 2009, Discovery of
columnar jointing on Mars. Geology. vol. 37,
no. 2, pp. 171-174 DOI: 10.1130/G25187A.1

Abstract at http://geology.gsapubs.org/cgi/content/abstract/37/2/171

Yours,

Paul H.

Astronaut's Video Satirizes NASA Bureaucracy

Paul
Mon Feb 9 13:28:46 EST 2009

Astronaut's Video Satirizes NASA Bureaucracy
by Nell Greenfieldboyce. Morning Edition, February 9, 2009

http://www.npr.org/templates/story/story.php?storyId=100346538

Andy Thomas/YouTube.com

http://www.youtube.com/watch?v=_424YskAfew

Yours,

Paul H.

"New Scientist" Commentary About Younger Dryas Impact Hypothesis

Paul
Sun Feb 8 17:05:33 EST 2009

Hecht, J., 2009, Beware Earth-shattering headlines.
New Scientist. no. 2694, p. 24 (February 5, 2009)

http://www.newscientist.com/article/mg20126947.000-beware-earthshattering-headlines.html

Yours,

Paul H.

Suspect in Tuscon Fossil and Mineral Thefts Arrested

by Paul
Sun Feb 8 16:57:47 EST 2009

Suspect in resort break-ins linked to fossil-mineral thefts
last year By Alexis Huicochea, Arizona Daily Star, Tucson,
Arizona, February 7, 2009

http://www.azstarnet.com/metro/279265

Yours,

Paul H.

Suspect in Tuscon Fossil and Mineral Thefts Arrested

Paul bristolia at yahoo.com
Sun Feb 8 16:57:47 EST 2009

Suspect in resort break-ins linked to fossil-mineral thefts
last year By Alexis Huicochea, Arizona Daily Star, Tucson,
Arizona, February 7, 2009

http://www.azstarnet.com/metro/279265

Yours,

Paul H.

Papers Dispute the Existence of Wildfires with Start of Younger Dryas

Paul
Fri Feb 6 16:30:31 EST 2009

Two papers, both of which dispute the occurrence of wildfires
associated with a hypothetical impact event at the start of the
Younger Dryas, have been recently published. They are:

1. Marlon, J. R., P. J. Bartlein, M. K. Walsh, S. P. Harrison, K. J.
Brown, M. E. Edwards, P. E. Higuera, M. J. Power, R. S.
Anderson, C. Briles, A. Brunelle, C. Carcaillet, M. Daniels,
F. S. Hu, M. Lavoie, C. Long, T. Minckley, P. J. H. Richard,
A. C. Scott, D. S. Shafer, W. Tinner, C. E. Umbanhowar, Jr.,
and C. Whitlock, 2009, Wildfire responses to abrupt climate
change in North America. Proceedings for the National
Academy of Science. Published online before print
February 3, 2009, doi: 10.1073/pnas.0808212106

Abstract at:

http://www.pnas.org/content/early/2009/02/03/0808212106.abstract

and 2. van der Hammen, T. and B. van Geel, 2008, Charcoal
in soils of the Allerød-Younger Dryas transition were the
result of natural fires and not necessarily the effect of an extra-
terrestrial impact. Netherlands Journal of Geosciences (Geologie
en Mijnbouw) vol. 87, no. 4, pp. 359-361.

PDF file at:

http://www.imep-cnrs.com/docu/charcoal.pdf
http://www.njgonline.nl/publish/articles/000404/english.html

A paper about the role of climatic change unrelated to
extraterrestrial impacts in wildfire synchrony is:

Kitzberger, T., P. M. Brown, E. K. Heyerdahl, T. W. Swetnam,
and T. T. Veblen, 2007, Contingent Pacific–Atlantic Ocean
influence on multi-century wildfire synchrony over western
North America. Proceedings of the National Academy of
Sciences of the United States of America. vol. 104 , no. 2.
pp. 543-548.

Abstract at:

http://www.pnas.org/content/104/2/543.abstract

Yours,

Paul H.

Prehistoric Fluvial Transport of Libyan Desert Glass From Original Impact Structure

by Paul
Sun Feb 1 01:39:11 EST 2009

Ramirez-Cardona, M., A. El-Barkooky, M. Hamdan, K.
Flores-Castro, N. I. Jimenez-Martinez, and M.
Mendoza-Espinosa, 2008, On the Libyan Desert Silica
Glass (LDSG) transport model from a hypothetical
impact structure. PIS-01 General contributions to
impact structures, International Geological
Congress Oslo 2008, Oslo, Norway.

"Fragments of this glass are mostly scattered upon
the exposed bedrock of Nubia group (cretaceous
sandstone), on a large surface area along wide
corridors between dunes of the Great Sand Sea
(SW of Egypt). This distribution is somewhat the
result of the tektite fluvial transport occurring
throughout the Oligocene-Miocene boundary."

http://www.cprm.gov.br/33IGC/1350834.html

PIS-01 General contributions to impact structures

http://www.cprm.gov.br/33IGC/Sess_303.html

International Geological Congress Oslo 2008

http://www.cprm.gov.br/33IGC/index.html

Yours,

Paul H.