underlain by "alluvium" (more likely dominated by paludal and/or 

 lacustrine deposits). Glacial deposits are shown along the margins 

 of the Yaak valley and just to the south of the Hoskins Lake basin. 

 Quite possible a veneer of glacial material beneath Hoskins Lake 

 "alluvium". No discussion of the character of unconsolidated 

 sediments. 



Middle Belt outcrops are mapped on both sides of Hoskins Lake. The 

 Middle Member of the Wallace Formation is shown on the ridge to the 

 west and the lower slopes of the ridge to the east. The lower 

 member of the Wallace is shown to the north, and the St. Regis 

 Formation outcrops on the higher slopes of the ridge to the east. 

 Both Wallace members contain limestone and dolomite interbeds, 

 apparently more common in the lower member, within dominantly 

 argillaceous sequences. The calcareous interbeds and lenses are 

 described as frequently pyritic. 



The lake basin overlies the trace of a north-south high angle 

 fault, one of several such structures traversing the map area. 



Bibliographic source: None - DHES collection 



Author: Rabe, F.W. and S.Chadde 



Title: Aquatic features of Research Natural Areas on the Kottenai 

 and Flathead National Forests, Montana. 



Series: None - USDA Forest Service(?) unnumbered report 



Date: 1995 



This document provides partial chemical analyses of Hoskins Lake 

 and "Hoskins Pond" to the north, along with limited depth 

 information from both. Field measurements showed modest vertical 

 pH and salinity gradients in Hoskins Pond, with slightly higher 

 dissolved solids and slightly lower pH near the pond bottom. The 

 maximum measured depth near the center of Hoskins Pond was 8.5 

 meters, and the maximum depth along a single transect across the 

 north end of Hoskins Lake was 7.5 meters. Drainage into and out 

 of Hoskins Lake is described as intermittent (without supporting 

 data) . 



The biological inventory of Hoskins Lake describes an abundance of 

 the freshwater sponge Spongilla lacustris. 



Indian M eadows. 



Bibliographic source: Geoindex lat-long search. 



Author: Mudge, M.R. , R.L. Earhart, K.C. Watts, E.T. Tuchek and W.L. 



32 



