Map showing total thickness of the Eagle Sandstone and Telegraph Creek Formation, Montana Geological Survey (U.S.) creator cartographer. Feltis, R. D. (Richard D.) 1930- author. cartographic map Maps. mtu 1982 monographic eng remote map 1 online resource (1 map). by R.D. Feltis. Includes bibliographical reference, text, and location map. W1130000 W1040000 N0490000 N0450000 n-us-mt Scale 1:1,000,000 (W 113°--W 104°/N 49°--N 45°) Aquifers Montana Maps Geology, Stratigraphic Cretaceous Maps Aquifers Cretaceous Geologic Period Geology, Stratigraphic Montana From 65 to 140 million years ago fast I 19.42/4:82-4033 I 19.42/4:82-4033 Map showing total thickness of the Eagle Sandstone and Telegraph Creek Formation, Montana Feltis, R. D. (OCoLC)10686563 Water-resources investigations report ; 82-4033 https://purl.fdlp.gov/GPO/gpo135492 COP 161221 20211120104741.0 in00004167272 eng