Data Series 280
U.S. GEOLOGICAL SURVEY
Data Series 280
Leigh Justet and Gerald E. Magner helped collect core and cutting samples archived at the U.S. Geological Survey Core Library and Data Center in Mercury, Nevada. Richard W. Spengler, Michael D. Carr, Susan A. Monsen, John N. Aleinikoff, Fran Singer, and Beth Widman helped collect and describe outcrop samples. Shannon Mahan helped make strontium isotope measurements on outcrop samples analyzed in the early 1990’s. James C. Cole provided outcrop samples from parts of the Nevada Test Site and Nellis Air Force Base that were off limits to the authors. Technical reviews by Leigh Justet and James C. Cole improved the quality of the manuscript and stratigraphic unit assignments.