Skip Links

USGS - science for a changing world

U.S. Geological Survey Open-File Report 2011–1274

In cooperation with the Los Angeles County Department of Public Works and the Water Replenishment District of Southern California

Paleontology and Geochronology of the Long Beach Core Sites and Monitoring Wells, Long Beach, California

By Kristin McDougall, John Hillhouse, Charles Powell, II, Shannon Mahan, Elmira Wan, and Andrei M. Sarna-Wojcicki

Thumbnail of and link to report PDF (123  kB) Abstract

The U.S. Geological Survey's Focus on Quaternary Stratigraphy in Los Angeles (FOQUS-LA) project was a cooperative coring program between Federal, State, and local agencies. It was designed to provide a better understanding of earthquake potentials and to develop a stratigraphic model of the western Los Angeles Basin in California.

The biostratigraphic, geochronologic, and paleoecologic analyses of eight wells drilled during the FOQUS-LA project are presented. These analyses are based on microfossils (benthic and planktic foraminifers), macrofossils, paleomagnetic stratigraphy, optically stimulated luminescence, thermoluminescence, radiocarbon dating, and tephrochronology. A geochronologic framework (incorporating paleomagnetism, luminescence, and tephrochronology) was used to calibrate the sequence stratigraphic units in the FOQUS-LA wells and also was used to calibrate the ages of the microfossil stage and zonal boundaries.

The results of this study show that (1) the offshore California margin zones can be used in a nearshore setting, and (2) the California margin zonal scheme refines the chronostratigraphic resolution of the benthic foraminiferal biostratigraphic framework for the Pacific Coast. Benthic foraminiferal stages are modified by the recognition of an early Hallian substage, which is a faunal change recognized throughout the Los Angeles Basin. Although no detailed macrofossil zonations exist for the Quaternary of southern California, several species, whose distribution is regulated by the climatic conditions, are useful as secondary marker species in the shallower water deposits of the Los Angeles Basin.

  • This report is available only on the Web.

For additional information:
Contact Information, Western Region Geology and Geophysics Science Center—Menlo Park
U.S. Geological Survey
345 Middlefield Road, MS-989
Menlo Park, CA 94025-3591
http://geomaps.wr.usgs.gov/

This report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.


Suggested citation:

McDougall, K., Hillhouse, J., Powell, C., II, Mahan, S., Wan, E., and Sarna-Wojcicki, A.M., 2012, Paleontology and geochronology of the Long Beach core sites and monitoring wells, Long Beach, California: U.S. Geological Survey Open-File Report 2011–1274, 235 p., 18 plates. (Available at http://pubs.usgs.gov/of/2011/1274/.)


Contents

Chapter 1—Introduction

Chapter 2—Long Beach Pier F Core Site and Monitoring Well, Long Beach, California

Chapter 3—Long Beach Pier C Core Site and Monitoring Well, Long Beach, California

Chapter 4—Long Beach Cabrillo High School Core Site and Monitoring Well, Long Beach, California

Chapter 5—Long Beach Webster School Core Site and Monitoring Well, Long Beach, California

Chapter 6—Long Beach City College Core Site and Monitoring Well, Long Beach, California

Chapter 7—Long Beach Water Treatment Plant Core Site and Monitoring Well, Long Beach, California

Chapter 8—Long Beach Water # 1 Core Site and Monitoring Well, Long Beach, California

Chapter 9—Westchester Core Site and Monitoring Well, Westchester,California

Chapter 10—Correlation, Summary, and Conclusions

Acknowledgments

References Cited

3 appendixes

18 plates


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/of/2011/1274/
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Saturday, January 12, 2013, 04:21:07 PM