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GSA TODAY (ISSN 1052-5173 USPS 0456-530) prints news JUNE 2015 | VOLUME 25, NUMBER 6
and information for more than 26,000 GSA member readers
and subscribing libraries, with 11 monthly issues (March/ Featured Articles
April is a combined issue). GSA TODAY is published by The
Geological Society of America® Inc. (GSA) with offices at SCIENCE :
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ing address of P.O. Box 9140, Boulder, CO 80301-9140, USA. 4 The evolution of end-member continental
GSA provides this and other forums for the presentation waters: The origin of acidity in southern
of diverse opinions and positions by scientists worldwide, Western Australia
regardless of race, citizenship, gender, sexual orientation, Kathleen Benison and Brenda Bowen
religion, or political viewpoint. Opinions presented in this
publication do not reflect official positions of the Society. Cover: Shallow acid saline water in Gneiss Lake, near Grass
© 2015 The Geological Society of America Inc. All rights Patch in Western Australia, is an example of end-member
reserved. Copyright not claimed on content prepared continental brines. Orange iron oxide staining and white
wholly by U.S. government employees within the scope of halite and gypsum precipitate on Precambrian quartzite
their employment. Individual scientists are hereby granted gravel in lake. Photo taken in January 2008, when lake water
permission, without fees or request to GSA, to use a single was undergoing evapo-concentration and had pH 2.0 and
figure, table, and/or brief paragraph of text in subsequent salinity 28% total dissolved solids. Photo by Kathleen
work and to make/print unlimited copies of items in GSA Benison. See related article, p. 4–10.
TODAY for noncommercial use in classrooms to further
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