1999 Fieldtrip Guidebook, Cenozoic Geology of the Northern Colorado River Extensional Corridor, Nevada and Arizona: Economic Implications of Extensional Segmentation Structures. J.E. Faulds, Editor. Introduction, discussion of the geologic setting, and eight detailed roadlogs integrated with eighteen short papers covering structure, stratigraphy, implications for hydrocarbons, and the Hualapai Basin salt deposit; three plates including a 1:24,000 geologic map of the Black Mountains accommodation zone. 183 pp. NPS 14 , $35.00