1. Department of Geological Sciences University of Texas at Austin Austin Texas USA
2. U.S. Geological Survey Geoscience and Environmental Change Science Center Denver Colorado USA
3. Department of Geosciences University of Arkansas Fayetteville Arkansas USA
4. Department of Geological Sciences Stanford University Stanford California USA
5. U.S. Geological Survey Geology, Minerals, Energy, and Geophysics Science Center Moffett Field California USA
6. U.S. Geological Survey Pacific Coastal and Marine Science Center Moffett Field California USA