ABANDONED SAND AND GRAVEL PITS --
Abandoned Sand and Gravel Pits, 1992 (Source scale is unknown)
shows the locations of abandoned sand and gravel pits, including 2,275 of 2,515
sand and gravel pit locations from the Abandoned Sand and Gravel Pit Database
of the Indiana Geological Survey.
Derived from the following unpublished report: Industrial Minerals Section Memorandum
Report 98, Indiana Geological Survey.
FGDC metadata: SAND_GRAVEL_PITS_ABANDONED_IN