Jason A Addison, USGS Geology, Minerals, Energy, & Geophysics Science Center, Menlo Park, CA, United States, Valerie Schwartz, Juul, Mountain View, CA, United States, Joseph A Carlin, California State University Fullerton, Geological Sciences, Fullerton, CA, United States, Jamie A Hayward, California State University Fullerton, Fullerton, CA, United States, Amy J Wagner, California State University, Sacramento, Geology, Sacramento, CA, United States, Bruce Finney, Idaho State University, Department of Geosciences, Idaho Falls, ID, United States and John Arthur Barron, USGS Geology, Mineral, Energy, & Geophysics Science Center, Menlo Park, CA, United States