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Pulverized rocks, coral reefs, seawater chemistry, and continental collisions
Date:7/12/2012

Boulder, Colo., USA Geology highlights include understanding new evidence for rock pulverization by catastrophic events near major faults in California and Japan; modern-day examples of active arc-continent collision in Taiwan; discovery and study of the highest-latitude coral reefs presently known on Earth, located in Japan; the puzzling record of the changing isotope ratio of calcium in seawater over the last 500 million years; and a possible refutation of hypotheses concerning shallow-water methane seep fauna.

Highlights are provided below. Geology articles published ahead of print can be accessed online at http://geology.gsapubs.org/content/early/recent. All abstracts are open-access at http://geology.gsapubs.org/; representatives of the media may obtain complimentary Geology articles by contacting Kea Giles at the address above.

Please discuss articles of interest with the authors before publishing stories on their work, and please make reference to Geology in articles published. Contact Kea Giles for additional information or assistance.

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Dynamic branched fractures in pulverized rocks from a deep borehole
Amir Sagy and Dorit Korngreen, Geological Survey of Israel, 30 Malkhei Israel Street, Jerusalem 95501, Israel. Posted online 12 July 2012; doi: 10.1130/G33194.1.

Both detection of paleo-catastrophic earthquakes and distinguishing between faults that generated earthquakes to more "quiet" faults have always been challenging tasks for geoscientists. Recently, zones of pulverized rocks were found in outcrops near major faults in California and Japan and it was hypothesized that t
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Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Source:Eurekalert

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