You searched for: Author Geological Survey (U.S.) Remove constraint Author: Geological Survey (U.S.) Subject Phosphate mines and mining Remove constraint Subject: Phosphate mines and mining Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Place Arkansas Remove constraint Place: Arkansas Place Delaware Remove constraint Place: Delaware Place Connecticut Remove constraint Place: Connecticut Format Shapefile Remove constraint Format: Shapefile Year 2003 Remove constraint Year: 2003
2003. Geological Survey (U.S.). This point shapefile represents locations of agricultural minerals operations in the United States. The data represent commodities covered by the M... National Atlas of the United States.