Search

Start Over Year 1972 Publisher U.S. Geological Survey Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. 2000 county boundaries of the United States

Datasets Harvard University Public content
1972. Geological Survey (U.S.). This map layer portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was crea... U.S. Geological Survey.

2. World Ore Deposits, 1999

Datasets Columbia University Restricted content
1972. David G. Frank. Ore Deposits is a point theme representing ore deposits throughout the world, locational and attribute information is taken from the 1999 Mineral R... U.S. Geological Survey.