Skip Links

USGS - science for a changing world

Scientific Investigations Map 3012

Precambrian Basement Structure Map of the Continental United States—An Interpretation of Geologic and Aeromagnetic Data

By Paul K. Sims, Richard W. Saltus, and Eric D. Anderson

Thumbnail of and link to report PDF (92.8 MB)
Scientific Investigations Map
3012 PDF (92.8 MB)

The Precambrian basement rocks of the continental United States are largely covered by younger sedimentary and volcanic rocks, and the availability of updated aeromagnetic data (NAMAG, 2002) provides a means to infer major regional basement structures and tie together the scattered, but locally abundant, geologic information.

Precambrian basement structures in the continental United States have strongly influenced later Proterozoic and Phanerozoic tectonism within the continent, and there is a growing awareness of the utility of these structures in deciphering major younger tectonic and related episodes. Interest in the role of basement structures in the evolution of continents has been recently stimulated, particularly by publications of the Geological Society of London (Holdsworth and others, 1998; Holdsworth and others, 2001). These publications, as well as others, stress the importance of reactivation of basement structures in guiding the subsequent evolution of continents. Knowledge of basement structures is an important key to understanding the geology of continental interiors.

Version 1.0

Posted July 2008


Suggested citation:

Sims, P.K., Saltus, R.W., and Anderson, E.D., 2008, Precambrian basement structure map of the continental United States—An interpretation of geologic and aeromagnetic data: U.S. Geological Survey Scientific Investigations Map 3012, scale: 1:8,000,000.



Document Accessibility: Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Acrobat Reader or similar software is required to view it. Download the latest version of Acrobat Reader, free of charge or go to access.adobe.com for free tools that allow visually impaired users to read PDF files.

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/sim/3012/index.html
Page Contact Information: USGS Publications Team
Page Last Modified: Wednesday, January 09 2013, 04:44:17 PM