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 ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
