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DECEMBER 2017 | VOLUME 27, NUMBER 12 SCIENCE

GSA TODAY (ISSN 1052-5173 USPS 0456-530) prints news 4 Tectonic Klippe Served the Needs of Cult
and information for more than 26,000 GSA member readers Worship, Sanctuary of Zeus, Mount Lykaion,
and subscribing libraries, with 11 monthly issues (March/ Peloponnese, Greece
April is a combined issue). GSA TODAY is published by The George H. Davis
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3300 Penrose Place, Boulder, Colorado, USA, and a mail- Cover: East-directed photograph of smooth conical summit
ing address of P.O. Box 9140, Boulder, CO 80301-9140, USA. region of the Sanctuary of Zeus, Mount Lykaion, Arcadia,
GSA provides this and other forums for the presentation Greece. At the very top is the only extant Late Bronze Age
of diverse opinions and positions by scientists worldwide, mountaintop ash altar. The summit “cone” is a thrust klippe,
regardless of race, citizenship, gender, sexual orientation, composed of Jurassic/Cretaceous strata faulted atop Paleocene
religion, or political viewpoint. Opinions presented in this strata. In the foreground is an abandoned shepherd’s hut and
publication do not reflect official positions of the Society. threshing circle. Photograph by George H. Davis. See related
© 2017 The Geological Society of America Inc. All rights article, p. 4–9.
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Erratum: The In Memoriam section of the Nov. 2017 issue of GSA Today (p. 22)
listed Jon C. Avent of Lopez Island, Washington, USA, as deceased. This is not the
case, and GSA deeply regrets this error.