Digitized Historical Borehole Geophysical Logs Throughout the Mississippi Alluvial Plain Aquifer System

This data release consists of historical borehole geophysical data collected by various entities and digitally recreated by the U.S. Geological Survey to characterize the physical properties of the subsurface in the Mississippi Alluvial Plain from Louisiana to Missouri. The geophysical log data were collected by different Federal, state, and local agencies throughout the area, and were obtained from two sources: Hart and Clark (2008) or the Mississippi Department of Environmental Quality (MDEQ) website. The log data generally consisted of either scanned .jpg or .tif images of the original log. The data was digitized using Neurolog v.2015.12 (NeuraLog.com). This process involves tracing each log over a user-defined grid area, and can be exported in various formats such as .las (log ascii standard) file that can be read into other software packages.