NATURAL GAMMA-RAY LOGS --
Natural Gamma-ray Logs in Unconsolidated Sediments, 2005 (1:100,000)
Natural gamma-ray logs can be used to interpret the character and thickness of shallow unconsolidated materials. These data show the availability of paper gamma-log records that were collected by the Indiana Geological Survey between 1978 and 2005.
FGDC metadata: UNCONSOLIDATED_GAMMA_LOGS_IGS_IN