Series: U.S. Geological Survey Open-File Report 83-502 



Regional mapping at 1:250,000 scale shows the LeBeau area underlain 

 by middle Belt (Proterozoic Y) formations, with the Spokane and 

 Empire Formations (dominantly clastic lithologies) at lower 

 elevations and large areas of Helena Formation (dominantly 

 calcareous and dolomitic lithologies) underlying topographic highs. 

 Numerous northwest trending normal faults (structural elements of 

 the "Rocky Mountain Trench") cross the general area. 



Surficial deposits are only broadly differentiated at this scale. 

 Lee Metcalf National Wildlife Refuge 



Bibliographic source: Geoindex lat-long search 



Author: McMurtrey, R.G. , R.L. Konizeski, M.V. Johnson and J.H. 

 Bartells 



Title: Geology and Water Resources of the Bitterroot Valley, 

 Southwestern Montana 



Series: U.S. Geological Survey Water-Supply Paper 1889 



Date: 1972 



Regional geologic mapping at 1:125,000 shows the refuge underlain 

 by modern Quaternary alluvium of the Bitterroot River. "Low 

 terrace alluvium", including probable fan material of the Burnt 

 Fork and Ambrose Creek, is shown just to the east. Tertiary 

 outcrops are shown three miles or more to the east. Potentiometric 

 mapping at the same scale interprets a potentiometric high beneath 

 the Burnt Fork. Water table depth at the time of mapping shown to 

 be 5 feet at a well adjacent to sample site. Tabulated chemical 

 analyses show dilute (<300 mg/1 TDS) calcium bicarbonate ground 

 water types beneath flood plain and terrace surfaces. 

 Transmissivities are reported to be high, with well yields reported 

 greater than 250 gallons per minute. 



Long Lake WPA 



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 



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