Geophysical Log Database for the Mississippi Embayment Regional Aquifer Study (MERAS)

By Rheannon M. Hart and Brian R. Clark

Ground-Water Resources Program

Scientific Investigations Report 2008Ð5192

Appendix 1. Geophysical Log Database

The geophysical log images are placed in an electronic directory and arranged by State 
and County, where each State and county is referred to by a code 
(http://www.epa.gov/enviro/html/codes/state.html).

Appendix 2. ASCII File of Geophysical Log Data

Basic data from the geophysical-log database were extracted to ASCII format for download. 
The data in the ASCII file consist of unique identifier (site_no); station name (station_nm); 
latitude (lat); longitude (lon); State and county code (FIPS); log datum (log_datum), in feet; 
path to log image (url); and the depth to the top of hydrogeologic units 
(codes listed in table 2 of the report), in feet.