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Miscellaneous Investigations Series I-1420 (NH-16)

Prepared in cooperation with the Alabama Geological Survey, the Mississippi Geological Survey, the Florida Bureau of Geology, the Georgia Geological Survey, and the Louisiana Geological Survey

Quaternary Geologic Map of the Mobile 4° x 6° Quadrangle, United States

State compilations by Charles W. Copeland, Jr., Katherine F. Rheams, Thornton L. Neathery, William A. Gilliland, Walter Schmidt, William C. Clark, Jr., and David E. Pope

Edited and integrated by Gerald M. Richmond, David S. Fullerton, and David L. Weide

Digital database by Charles A. Bush

Thumbnail of and link to map PDF (2.6 MB)

This map is part of the Quaternary Geologic Atlas of the United States (I-1420). It was first published as a printed edition in 1988. The geologic data have now been captured digitally and are presented here along with images of the printed map sheet and component parts as PDF files.

The Quaternary Geologic Map of the Mobile 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other materials that accumulated or formed during the past 2+ million years, the period that includes all activities of the human species. These materials are at the surface of the Earth. They make up the ground on which we walk, the dirt in which we dig foundations, and the soil in which we grow crops. Most of our human activity is related in one way or another to these surface materials that are referred to collectively by many geologists as regolith, the mantle of fragmental and generally unconsolidated material that overlies the bedrock foundation of the continent. The maps were compiled at 1:1,000,000 scale.

In recent years, surficial deposits and materials have become the focus of much interest by scientists, environmentalists, governmental agencies, and the general public. They are the foundations of ecosystems, the materials that support plant growth and animal habitat, and the materials through which travels much of the water required for our agriculture, our industry, and our general well being. They also are materials that easily can become contaminated by pesticides, fertilizers, and toxic wastes. In this context, the value of the surficial geologic map is evident.

First posted September 9, 2010

For additional information contact:

Center Director, USGS Geology and Environmental Change Science Center
Box 25046, Mail Stop 980
Denver, CO 80225

Part or all of 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:

Copeland, C.W., Jr., Rheams, K.F., Neathery, T.L., Gilliland, W.A., Schmidt, Walter, Clark, W.C., Jr., and Pope, D.E., 1988, Quaternary geologic map of the Mobile 4° x 6° quadrangle, United States: U.S. Geological Survey Miscellaneous Investigations Series Map I–1420 (NH–16), scale 1:1,000,000.

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