SAND THICKNESS POINTS (ILITH) --
Total Sand Thickness (Shapefile), 2000 (Source scale is unknown)
Shows total thickness of sand, as derived from logs of water wells. Because
sand and gravel layers can constitute aquifers, such layers are of hydrologic
The layer is derived from the iLITH Water-Well Database of the Indiana Geological
Survey, which allows users to interact with a portion of the Water-Well Record
Database of the Indiana Department of Natural Resources. iLITH differs from
the IDNR database in that lithologic descriptions and drilling contractor names
have been standardized and locational information for a subset of water-well
logs has been verified.
This shapefile presents the same data as shown in a grid named "SAND_ILITH_IN."
FGDC metadata: SAND_ILITH_PTS_IN