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



Thursday, 26 June 2008

Using GIS for Meteorite Hunting and Study

Using GIS for Meteorite Hunting and Study

Paul bristolia at yahoo.com
Thu Jun 26 23:52:17 EDT 2008

McCartney Taylor wrote

"I, too, am a GIS person. Since Land ownership &
GIS has just been brought up, I have to take this
one step farther and mention good & free
GIS packages."

I do not bother with ESRI as a GIS program even though
where I work has a group license for it. It takes a long,
long
time to learn how to work. Instead, I use Global Mapper,
which only costs about 300.00 dollars and is very easy to
use and does what I need it to do. Also, their support
people, not only return email and other inquiries about
problems, they typically do it the same day that you
contact them. More information can be found at:

Global Mapper - http://www.globalmapper.com/

It does a spectacular job with Digital Elevation Models
(DEMs)
especially those made from LIDAR data. Some examples of
DEMs made from the LIDAR data can be seen in "The
Scotlandville, Denham Springs, and Baton Rouge Faults - A
Map Guide for Real Estate Buyers, Sellers, and Developers
in
the Greater Baton Rouge Area" at

http://www.lgs.lsu.edu/deploy/uploads/BRFaultsGuide.pdf

Yours,

Paul H.

Mars hit by huge object four billion years ago, study finds

Mars hit by huge object four billion years ago, study finds

Paul bristolia at yahoo.com
Thu Jun 26 09:08:30 EDT 2008

Asteroid impact made Mars two-faced, Telegraph.co.uk, United Kingdom
http://www.telegraph.co.uk/earth/main.jhtml?view=DETAILS&grid=&xml=/earth/2008/06/25/scimars125.xml

Giant impact explains Mars dichotomy EurekAlert (press release), DC
http://www.eurekalert.org/pub_releases/2008-06/ciot-gie062308.php

Mystery Behind Mars’s Lopsided Shape Revealed eFluxMedia
http://www.efluxmedia.com/news_Mystery_Behind_Marss_Lopsided_Shape_Revealed_19520.html

Yours,

Paul H.

100th Anniversary of the Tunguska impact Nature issue

100th Anniversary of the Tunguska impact Nature issue

Paul bristolia at yahoo.com
Thu Jun 26 09:05:06 EDT 2008

The latest issue of Nature (Volume 453 Number 7199)
celebrates the 100th Anniversary of the Tunguska impact.
It has papers and articles about impact events on the Moon
and Mars and NEOs. The URL for this issue is:

http://www.nature.com/nature/journal/v453/n7199/

The articles and papers include:

1. Planetary science: Tunguska at 100

2. Planetary science: The hole at the bottom of the Moon

3. Planetary science: The burger bar that saved the world

4. Gallery feature: All craters great and small

5. What Spaceguard did

6. Planetary science: Forming the martian great divide

7. Mega-impact formation of the Mars hemispheric dichotomy
by Margarita M. Marinova, Oded Aharonson & Erik Asphaug
http://www.nature.com/nature/journal/v453/n7199/abs/nature07070.html

8. The Borealis basin and the origin of the martian crustal dichotomy
Jeffrey C. Andrews-Hanna, Maria T. Zuber & W. Bruce Banerdt
http://www.nature.com/nature/journal/v453/n7199/abs/nature07011.html

9. Implications of an impact origin for the martian hemispheric dichotomy
F. Nimmo, S. D. Hart, D. G. Korycansky & C. B. Agnor
http://www.nature.com/nature/journal/v453/n7199/abs/nature07025.html

Giant Asteroid Flattened Half of Mars, Studies Suggest, Scientific American
http://www.sciam.com/article.cfm?id=giant-asteroid-flattened

Mars' two-faced riddle 'solved', BBC News, UK
http://news.bbc.co.uk/2/hi/science/nature/7473128.stm

Yours,

Paul H.

Wednesday, 25 June 2008

New Paper on Silverpit (Impact ??) Structure, North Sea

New Paper on Silverpit (Impact ??) Structure, North Sea

Paul bristolia at yahoo.com
Wed Jun 25 15:31:00 EDT 2008

Dear Friends,

In the Journal of the Geological Society, there is a new paper on the proposed
Silverpit Impact Structure. It is:

Wall, M.L.T. , and J. Cartwright and R.J. Davies, 2008, An Eocene
age for the proposed Silverpit Impact Crater. Journal of the Geological
Society. vol. 165, no. 4, pp. 781-794
DOI: 10.1144/0016-76492007-138

http://ejournals.ebsco.com/Article.asp?ContributionID=1441435
http://ejournals.ebsco.com/direct.asp?ArticleID=4ABEBE2BF6408E5C5CB6

Using seismic stratigraphy, and microfossil, including calcareous nanofossil,
data from regional wells, they dated the age of the first sediments onlapping
into this structure. This relationship suggests that the structure is Middle
Eocene in age. As a result, they conclude that this structure is 10 to 15 million
years younger than previous age estimates and this structure is far too young
to be associated with the K-T boundary. They also argue that the Silverpit
structure is considerably younger than when regional folding and salt
flowage occurred. This, they argue makes it too young to have been created
by this regional folding and salt flowage as argued by other papers.

Silverpit crater
http://en.wikipedia.org/wiki/Silverpit_crater

North Sea crater shows its scars
http://news.bbc.co.uk/1/hi/sci/tech/4360815.stm

Yours,

Paul H.


Santa Fe, NM Impact Crater Latitude and Longitude

Santa Fe, NM Impact Crater Latitude and Longitude

Paul bristolia at yahoo.com
Wed Jun 25 12:51:32 EDT 2008

In “Santa Fe, NM Impact Crater article”, Charles O'Dale
asked about the Santa Fe - Hyde Park, New Mexico, Impact
Structure:

“Any idea on the exact position of this structure (Lat/Long)?”

According to the SEIS database, version 10, it is:

Latitude: 35.728277
Longitude: 105.85966

The SEIS database, version 10 can be found at:

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

yours,

Paul H.

Friday, 20 June 2008

New Paper About Chondrule and Chondrite Formation

New Paper About Chondrule and Chondrite Formation

Paul bristolia at yahoo.com
Fri Jun 20 15:03:01 EDT 2008

In the June 20, 2008 issue of Science there is a paper about
the formation of Chondrules and Chondrites.

It is:

Alexander, C. M. O'D., J. N. Grossman, D. S. Ebel, and F. J. Ciesla,
2008, The Formation Conditions of Chondrules and Chondrites.
Science. vol.. 320, no. 5883, pp. 1617-1619.
DOI: 10.1126/science.1156561

http://www.sciencemag.org/cgi/content/abstract/320/5883/1617

Yours,

Paul H.

Monday, 9 June 2008

Correct URLS to PDF files of Tunguska “crater” papers

Correct URLS to PDF files of Tunguska “crater” papers

Paul bristolia at yahoo.com
Mon Jun 9 09:30:49 EDT 2008

In my initial post I have the wrong URLs for some of the papers.
which Listed in it. The old post was at:

http://six.pairlist.net/pipermail/meteorite-list/2008-June/045010.html

The correct URLs for the PDF files are:

Gasperini, L., F. Alvisi, G. Biasini, E. Bonatti, G. Longo, M.
Pipan, M. Ravaioli and R. Serra, 2008, A possible impact
crater for the 1908 Tunguska Event. Terra Nova. vol. 19,
no. 4, pp. 245-251 doi: 10.1111/j.1365-3121.2007.00742.x
Correct PDF file

http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2007.00742.x

The comment and reply are:

Collins, G. S., N. Artemieva, K. Wünnemann, P. A. Bland,
W. U. Reimold, and C. Koeberl, 2008, Evidence that Lake
Cheko is not an impact crater. Terra Nova. vol. 20, no. 2,
pp. 165–168 doi:10.1111/j.1365-3121.2008.00791.x
Correct PDF file

http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2008.00791.x

Gasperini, L., Enrico Bonatti, and Giuseppe Longo, 2008,
Lake Cheko and the Tunguska Event: impact or non-impact?
Terra Nova. vol. 20, no. 2, pp. 169-172,
doi: 10.1111/j.1365-3121.2008.00792.x
Correct PDF file

http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2008.00792.x

Yours,

Paul H.

Saturday, 7 June 2008

Comment and reply to Tunguska "crater" paper now available online

Comment and reply to Tunguska "crater" paper now available online

Paul bristolia at yahoo.com
Sat Jun 7 16:54:18 EDT 2008

The comment and reply on the alleged crater associated with the
Tunguska impact event are now online and free to download.

The original paper is:

Gasperini, L., F. Alvisi, G. Biasini, E. Bonatti, G. Longo, M.
Pipan, M. Ravaioli and R. Serra, 2008, A possible impact
crater for the 1908 Tunguska Event. Terra Nova. vol. 19,
no. 4, pp. 245-251 doi: 10.1111/j.1365-3121.2007.00742.x

Web page
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.2007.00742.x

PDF file
http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2008.00792.x

The comment and reply are:

Collins, G. S., N. Artemieva, K. Wünnemann, P. A. Bland,
W. U. Reimold, and C. Koeberl, 2008, Evidence that Lake
Cheko is not an impact crater. Terra Nova. vol. 20, no. 2,
pp. 165–168 doi:10.1111/j.1365-3121.2008.00791.x

Web Page
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.2008.00791.x

PDF file
http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2008.00792.x

Gasperini, L., Enrico Bonatti, and Giuseppe Longo, 2008, Lake
Cheko and the Tunguska Event: impact or non-impact? Terra Nova.
vol. 20, no. 2, pp. 169-172, doi: 10.1111/j.1365-3121.2008.00792.x

Web Page
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.2008.00792.x

PDF file
http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-3121.2008.00792.x

Yours,

Paul H.

Monday, 2 June 2008

"GSA Today" Comments and Reply Published on Firestone's and Abott's Research

"GSA Today" Comments and Reply Published on Firestone's and Abott's Research

Paul bristolia at yahoo.com
Mon Jun 2 16:41:57 EDT 2008

1. The Original Paper by Printer and Ishman

Pinter, N., and S. E. Ishman, 2008,Impacts, mega-tsunami, and
other extraordinary claims. GSA Today. vol. 18, no. 1 pp. 37–38
Web page - http://www.gsajournals.org/perlserv/?request=get-document&doi=10.1130%2FGSAT01801GW.1
PDF File - http://www.gsajournals.org/archive/1052-5173/18/1/pdf/i1052-5173-18-1-37.pdf

2. Bunch's and Others’ Comments

Bunch, T. P., J. Kennett, and D. K. Kennett, 2008, Comment:
Impacts, mega-tsunami, and other extraordinary claims. GSA
Today. vol. 18, no. 6 p. 11
Web Page - http://www.gsajournals.org/perlserv/?request=get-document&doi=10.1130%2FGSATG10C.1
PDF File - http://www.gsajournals.org/archive/1052-5173/18/6/pdf/i1052-5173-18-6-11.pdf

Bunch et al.'s SUPPLEMENTARY CALCULATIONS AND INFORMATION:
Web Page - http://ie.lbl.gov/mammoth/GSAToday.html

3. Firestone's and Others’ Comments

Firestone, R. B., and A. West, 2008, Impacts, mega-tsunami,
and other extraordinary claims: COMMENT. GSA Today Online.
April 2008, DOI: 10.1130/GSATG11C.1, p. e13
Web Page - http://www.gsajournals.org/perlserv/?request=get-static&name=i1052-5173-18-6-e13
PDF File - http://www.gsajournals.org/pdf/online_forum/i1052-5173-18-6-e13.pdf

4. Abbott's and Others’ Comments

Abbott, D. H., E. F. Bryant, V. Gusiakov, W. B. Masse, and
D. Breger, 2008, Impacts, mega-tsunami, and other
extraordinary claims: COMMENT. Published Online: April 2008,
DOI: 10.1130/GSATG9C.1, p. e12
Web Page - http://www.gsajournals.org/perlserv/?request=get-static&name=i1052-5173-18-6-e12
PDF File - http://www.gsajournals.org/pdf/online_forum/i1052-5173-18-6-e12.pdf

5. Printer's and Ishman’s Reply to the Above Comments

Pinter, N., and S. E. Ishman, 2008, Impacts, mega-tsunami,
and other extraordinary claims: REPLY: GSA Today online,
June 2008, DOI: 10.1130/GSATG13Y.1
Web Page - http://www.gsajournals.org/perlserv/?request=get-static&name=i1052-5173-18-6-e14
PDF file - http://www.gsajournals.org/pdf/online_forum/i1052-5173-18-6-e14.pdf

SUPPLEMENTARY CALCULATIONS AND INFORMATION, Pinter, N., and
S.E. Ishman, 2008. Reply to comments on “Impacts, megatsunami,
and other extraordinary claims.” GSA Today, vol. 18.
PDF file - http://www.geology.siu.edu/GSATSupplement.pdf

6. GSA Today: Comments and Replies web page - http://www.gsajournals.org/perlserv/?request=get-static&name=i1052-5173-14-3

An interesting paper is:

Reimold W.U. 2007. The impact crater bandwagon. Meteoritics
& Planetary Science. v.42. p 1467–1472.

Yours,

Paul H.