Billingsley, George H.

About the author


Physiographic Rim of The Grand Canyon, Arizona: A Digital Database

This Open-File report is a digital physiographic map database. This physiographic map of the Grand Canyon is modified from previous versions by Billingsley and Hendricks (1989), and Billingsley and others (1997). The boundary is drawn approximately along

Geologic Map and Digital Database of Clayhole Wash and Vicinity, Mohave County, Northwestern Arizona

This digital map database is compiled from unpublished data and new mapping by the authors and represents the general distribution of surficial and bedrock geology in the mapped area. Together with the accompanying pamphlet, it provides current informatio

Geologic Map and Digital Database of Hidden Hills and Vicinity, Mohave County, Northwestern Arizona

This digital map database is compiled from unpublished data and new mapping by the authors and represents the general distribution of surficial and bedrock geology in the mapped area. Together with the accompanying pamphlet, it provides current informatio

Surficial Geologic Map of The Loop and Druid Arch Quadrangles, Canyonlands National Park, Utah

This geologic map is a product of a cooperative project between the U.S. Geological Survey and the U.S. National Park Service to provide geologic information about this part of Canyonlands National Park, Utah. This digital map database contains bedrock da

Geologic Map of Upper Clayhole Valley and Vicinity, Mohave County, Northwestern Arizona

This digital map database is compiled from unpublished data and new mapping by the authors and represents the general distribution of surficial and bedrock geology in the mapped area. Together with the accompanying pamphlet, it provides current informatio