Boulder, Colo., USA Geosphere articles posted online 17 Mar. 2014 include additions to two series: "CRevolution 2: Origin and Evolution of the Colorado River System II" and "Origin and Evolution of the Sierra Nevada and Walker Lane." Other articles present new seismic data for the Slate Range of California, USA; the first detailed geologic map from the Likhu Khola region of east central Nepal; and a review of pre-21st century ideas about the origin of Grand Canyon.
Abstracts for these and other Geosphere papers are available at http://geosphere.gsapubs.org/. Representatives of the media may obtain complimentary copies of Geosphere articles by contacting Kea Giles at the address above.
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Middle Miocene to recent exhumation of the Slate Range, eastern California, and implications for the timing of extension and the transition to transtension
J. Douglas Walker et al., Department of Geology, University of Kansas, Lawrence, Kansas 66045, USA. Published online 17 Mar. 2014; http://dx.doi.org/10.1130/GES00947.1.
Faulting in western North America reflects the interaction of the Pacific tectonic plate with the North American one. This paper by J. Douglas Walker of the University of Kansas and colleagues presents new data on how these plates have interacted over the past 15 million years. New data for the Slate Range of California shows that there was a change at about four million years ag
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