Date: 1989 



Regional compilation at a scale of 1:500,000. See other entries. 



Bibliographic soxirce: Geoindex lat-long search 



Author: Col ton, R.B., S.J. Luft and G.P. Cormier 



Title: Photogeologic and reconnaissance geologic map of the Miles 

 City quadrangle, Montana 



Series: USGS Miscellaneous Field Studies Map MF-1682 



Date: 1984 



Surficial geologic mapping at 1:24,000 scale shows the site to be 

 an abandoned side channel of the Yellowstone, developed along the 

 edge of the modern Yellowstone floodplain and just below the 

 Holocene/Pleistocene(?) terrace underlying Miles City. The map 

 provides only a generalized description of the alluvial material, 

 citing literature describing it's thickness as up to 15 meters. 



The adjacent bedrock outcrops on both sides of the Yellowstone are 

 mapped as the Tullock Member of the Fort Union Formation, which is 

 described as lithologically similar to the overlying Lebo Member, 

 but having a higher proportion of sandstones. 



This map provides no description of the hydraulic characteristics 

 of the map units. 



Bibliographic source: Geoindex lat-long search 



Author: Lewis, B.D. and R.S. Roberts 



Title: Geology and water-yielding characteristics of rocks of the 

 northern Powder River Basin, southeastern Montana 



Series: USGS Miscellaneous Investigations Series Map I-847-D 



Date: 1978 



Regional mapping at 1:250,000 scale ends at the Yellowstone River, 

 showing geology on the southern side only. Lower outcrops along 

 the river are shown as the Tullock Member of the Fort Union 

 Formation, with extensive Lebo Member outcrops and a broad upland 

 area of the Tongue River Member to the southeast. 



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