You searched for: Subject Geoscientific Information Remove constraint Subject: Geoscientific Information Subject Economy Remove constraint Subject: Economy Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Place Delaware Remove constraint Place: Delaware Year 2002 Remove constraint Year: 2002
2002. Geological Survey (U.S.) Minerals Information Team. This point shapefile includes sand and gravel operations in the United States. These data were obtained from information reported voluntarily to th... National Atlas of the United States.