TY - MAP ID - 136281236 TI - Map showing total thickness of the Lakota Formation and equivalent rocks, Montana AU - Feltis, R. D. AU - Geological Survey (U.S.) PY - 1982 PB - Helena, Montana : Denver, Colorado : Department of the Interior, United States Geological Survey, Open-File Services Section, Western Distribution Branch, U.S. Geological Survey. DB - UniCat KW - Aquifers KW - Geology, Stratigraphic KW - From 65 to 140 million years ago KW - Lakota Formation KW - Montana. UR - https://www.unicat.be/uniCat?func=search&query=sysid:136281236 AB - ER -