Preliminary Bedrock Geologic Map of the Blythe 30' x 60' Quadrangle, California and Arizona

Open-File Report 2021-1097
Prepared in Cooperation with the Arizona Geological Survey
Compiled by: Paul StoneJon E. Spencer, and L. Sue Beard



The Blythe 30' x 60' quadrangle in southeastern California and southwestern Arizona displays complex geology that includes Mesozoic contractional deformation, metamorphism, and magmatism in addition to Cenozoic extensional deformation and magmatism. Previous geologic map compilations predate recent geologic mapping efforts that have contributed new insights into the stratigraphy and structure of this quadrangle. This new map, compiled in collaboration with the Arizona Geological Survey, incorporates these recent mapping efforts to provide an updated depiction of the quadrangle’s geologic framework. The scope of this map is limited to bedrock units of Miocene and older age because younger deposits have not been mapped in enough detail across the quadrangle to support a systematic compilation.

Suggested Citation

Stone, P., Spencer, J.E., and Beard, L.S., comps., 2022, Preliminary bedrock geologic map of the Blythe 30' x 60' quadrangle, California and Arizona: U.S. Geological Survey Open-File Report 2021–1097, 1 sheet, scale 1:100,000, 10-p. pamphlet,

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Introduction  
  • Description of Map Units  
  • Acknowledgments  
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Preliminary bedrock geologic map of the Blythe 30' x 60' quadrangle, California and Arizona
Series title Open-File Report
Series number 2021-1097
DOI 10.3133/ofr20211097
Year Published 2022
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geology, Minerals, Energy, and Geophysics Science Center
Description Report: iv, 10 p., 1 Sheet; 50.42 x 33.06: Data Release
Country United States
State Arizona, California
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details