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Map Showing Cumulative Thickness of Sandstone in the Swift Formation, Montana
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Great Plains. The purpose of this map, which is a product of that study, is to show the cumulative thickness of sandstone in the Swift Formation.
Date:
1982
Creator:
Feltis, R. D.
System:
The UNT Digital Library
Map Showing Altitude of the Top of the Swift Formation, Montana
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the norther Great Plains. The purpose of this map, which is a product of that study, is to show the altitude of the top of the Swift Formation.
Date:
1982
Creator:
Feltis, R. D.
System:
The UNT Digital Library
Map Showing Total Thickness of the Swift Formation, Montana
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the norther Great Plains. The purpose of this map, which is a product of that study, is to show the total thickness of the Swift Formation.
Date:
1982
Creator:
Feltis, R. D.
System:
The UNT Digital Library