[meteorite-list] Re: Desert Varnish - On-line Summary Article

From: Keith <littlejo_at_meteoritecentral.com>
Date: Thu Apr 22 10:07:01 2004
Message-ID: <Pine.SOL.4.33.0210141358280.16687-100000_at_katie.vnet.net>

In [meteorite-list] Desert Varnish
and on Wed, 09 Oct 2002 18:05:58 -0400 ,
stan szalkowski wrote:

>Hi,
>Is there anyone out there who is an expert
>on "Desert Varnish". How long it takes to
>form and what causes it? Is it typical in
>all desert environments?

Dear Stan;

A considerable number of your questions are
answered in an on-line summary article
published in GSA Today and available on-line.

The article is:

Broecker, W. S., and T. Liu, 2001: Rock Varnish: Recorder
of Desert Wetness?. GSA Today. vol. 11, no. 8, pp. 4P10.

The article discusses the potential and problems
with using rock varnish / desert varnish to date
rock surfaces. It can be found at:

http://www.gsajournals.org/gsaonline/
?request=get-document&issn=1052-5173&volume=011&issue=08&page=0004

http://www.gsajournals.org/gsaonline/
?request=get-pdf&file=i1052-5173-011-08-0004.pdf

(Above URLS have to be reassembled in oder to work.)

and finally at:

http://www.geosociety.org/pubs/gsatoday/gsatoday2001.htm

The search pages for the on-line articles can
be found at:

http://www.gsajournals.org/gsaonline/?request=search-simple

The "GSA Today Archive" can be found at:
http://www.geosociety.org/pubs/gsatoday/ and

Some other references are:

Dorn, R. I., 1983, Cation-ratio dating: A new
rock varnish age determination technique:
Quaternary Research. vol. 20, pp. 49P73.

Fleisher, M., T. Liu, W. S. Broecker, and W.
Moore, 1999, A clue regarding the origin of
rock varnish: Geophysical Research Letters.
vol. 26, pp. 103P106.

Yours,

Keith Littleton
New Orleans, LA
Received on Mon 14 Oct 2002 02:01:40 PM PDT