1:100,000 scale Surface Geology Maps

Ordering Information:

Printed maps (lithograph) are $20.00 each. Note: the Red River Valley has been revised substantially and it is advised to order the most recent PDF map or order as print on demand. Maps not lithographed (Alexandria, Natchez, and New Roads) are available as print on demand. For these and PDF version of maps, please contact Melissa Esnault (mesnau1@lsu.edu) for details.

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Disclaimer: "The views and conclusions contained in these documents/data are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government or the state of Louisiana. These maps/data have been carefully prepared from the best existing sources available at the time of preparation. However, the Louisiana Geological Survey and Louisiana State University do not assume responsibility or liability for any reliance thereon.  This information is provided with the understanding that it is not guaranteed to be correct or complete, and conclusions drawn from such data are the sole responsibility of the user. These regional geologic quadrangles are intended for use at the scale of 1:100,000.  A detailed on-the-ground survey and analysis of a specific site may differ from these maps."


100k geology index