same base as Mudge and Earhart (1991) cited above. Bedrock mapped 

 beneath Bent Flat glacial cover (not shown) is a downdropped block 

 of Devonian undifferentiated, ridges to the east are shown as 

 Cambrian undifferentiated, with Bent Mountain relatively uplifted 

 Belt (Mount Shields Formation). Both the Cambrian and Devonian 

 sections are described as heavy in carbonates, with the Devonian 

 sequence including evaporite-solution breccias. 



Bibliographic source: Geoindex lat-long search 



Author: Johns, W.M. 



Title: Geology and mineral deposits of Lincoln and Flathead 

 Counties , Montana 



Series: Montana Bureau of Mines and Geology Bulletin 79 



Date: 1970 



Regional mapping at approximate scale of 1:125,000 shows Bent Flat 

 underlain by undifferentiated glacial material. Bedrock mapping 

 differs from later interpretations (Mudge and others) in showing 

 lower slopes of ridges draining to Bent Flat as undifferentiated 

 Devonian rather than Cambrian. Bent Mountain ridgetop is shown as 

 undifferentiated Missoula Group (Belt). The Bent Flat buried fault 

 of Mudge and Erhart is not shown. 



Benton LaKe. 



Bibliographic source: Geoindex lat-long search 



Author: Colton, R.B., R.W. Lemke and R.M. Lindvall 



Title: Glacial map of Montana east of the Rocky Mountains 



Series: U.S. Geological Survey Miscellaneous Geologic 

 Investigations Map 1-327 



Date: 1961 



Regional mapping of glacial surface features at 1:500,000 scale 

 shows Benton Lake just within the margin of maximum glacial 

 advance, notwithstanding the glaciolacustrine sediments described 

 by others as underlying the lake basin. This interpretation 

 suggests that the surficial stratigraphy may include till as well 

 as lacustrine sediments. 



