Kootenai, Morrison, Swift, Rierdon, Sawtooth, and Mississippian 

 Castle Reef Dolomite( ?? ) . Dips are steeply westward. Possible 

 aquifers include the Kootenai, Swift and Castle Reef Dolomite. 



Bibliographic source: Geoindex lat-long search 



Author: Mudge, M.R. 



Title: Surficial geologic map of the Sawtooth Ridge quadrangle, 

 Teton and Lewis and Clark counties, Montana 



Series: USGS Geologic Quadrangle Map GQ-610 



Date: 1967 



Wagner Basin site is at the northern extremity of coverage by this 

 sheet. Surficial deposits at the site are mapped as alluvium. 

 Outwash deposits are mapped along western margin of the basin to 

 the west of the wetland. Terrace gravels, reportedly about 20 feet 

 thick, presumably Sun River gravels, are shown at the lower edge 

 of the basin along Diversion Lake. 



Bibliographic source: Geoindex lat-long search 



Author: Mudge, M.R. and R.L. Earhart 



Title: Bedrock geologic map of part of the northern Disturbed 



Belt, Lewis and Clark, Teton, Pondera, Glacier, Flathead 

 Cascade and Powell Counties, Montana 



Series: U.S. Geological Survey Miscellaneous Investigation Series 

 Map 1-1375 



Date: 1983 



Geologic mapping at scale of 1:125,000 shows the Wagner Basin area 

 underlain by intercalated thrust fault slices of Madison Group, 

 undifferentiated Mount Pablo Formation (Lower Cretaceous), Morrison 

 Formation and Ellis Group (Upper Jurassic). Dips are westward at 

 30 to 65 degrees. 



The Mount Pablo Formation consists of up to 90 meters of 

 nonmarine sediments, including up to 10 meters of lacustrine 

 limestone near the top of the section. The Ellis Group described 

 as predominantly clastic marine sediments of varying lithology, 

 including phosphatic beds. The description of Madison Group 

 Formations includes dolomite increasing westward, but no mention 

 of gypsum or other evaporites. 



71 



