Counties, Montana 



Series: USGS Bulletin 847-C 



Date: 1936 



Geologic mapping at 1:62,500 scale shows the Fox Lake area 

 underlain by Quaternary alluvium, undifferentiated between Holocene 

 and Pleistocene. The mapped alluvium is continuous across modern 

 divides to Redwater Creek to the west and the North Fork of Burns 

 Creek to the south. The drainage development and sediment are 

 likely of glacial origin, at least in part. The alluvium is 

 described as being as much as 30 feet thick in Redwater Creek and 

 other larger drainages. There is no discussion of hydraulic 

 characteristics of map units. 



Fox Lake was described at the time as perennial but seasonally 

 highly variable in size, and surrounded by salinated flats during 

 low-water periods. 



The Redwater Creek - Fox Creek - North Fork Burns Creek channel is 

 interpreted as a mid-Pleistocene (Illinoisan or lowan) diversion 

 channel of the Pleistocene Missouri River. [If this is correct, 

 there may be substantial gravel deposits underlying the channel.] 

 Lacustrine sediments related to ice-marginal impoundments are 

 described in Redwater Creek (and may underlie Fox Lake also). The 

 southern limit of glaciation is shown several miles to the north, 

 on the Missouri side of the Yellowstone/Missouri divide. 



Bedrock in the entire Fox Creek drainage is shown as the Tullock 

 Member of the Fort Union Formation. 



Freezeout 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 Freezeout Lake (shown as Greenfield Lake on this map) near the 

 western limit of Glacial Lake Great Falls and outside of the 

 maximum extent of glacial advance. 



