points in this small lake (nearly 100% difference in specific 

 conductance). No historical (pre-1990) water quality data are 

 given. 



Mary^s Froa Pond 



Bibliographic source: Montana Bureau of Mines and Geology 

 Publications Index 



Author: Sahinen, U.M. 



Title: Mines and mineral deposits of Missoula and Ravalli 

 Counties, Montana 



Series: Montana Bureau of Mines and Geology Bulletin 8. 



Date: 1957 



Generalized geologic map at a large scale appears to show Mary's 

 Frog Pond underlain by undifferentiated Ravalli Group formations 

 of Proterozoic Y (Belt) age, just across the contact from the 

 granitic rocks of the Cretaceous-aged Idaho batholith. [This is an 

 ambiguous map scale but was corroborated by a larger-scale map of 

 the area, reviewed quickly once and not found since.] 



Bibliographic source: None - DHES collection 



Author: Rabe, F.W., R.L. Bursik and E.B. Cantor 



Title: Classification and monitoring of wetlands in established 

 and proposed natural areas. 



Series: Project report on USDA Forest Service Intermountain 

 Research Station Proposal #89009. 



Date: 198? 



This document contains a partial chemical analysis dating from 

 June(?) or July(?) of 1987, along with biological inventory data. 

 The site descripiton refers to the basin as a "deep glacial scour" 

 but provides no actual depth measurement. 



Medicine Lake 



49 



