COMO ANTICLINAL. 93 



along the shore during the dry season. A spring at the southeast corner, 

 and • one-fourth of a mile from the railroad-station, pours a considerable 

 amount of fresh water into the lake. 



It is not impossible that, scattered over the area of the Laramie Plains, 

 may be found isolated patches of Tertiary strata; but none were positively 

 recognized as belonging to beds older than the Cretaceous. In one or two 

 localities, where rocks of Cretaceous age lie nearly horizontal, beds of coarse, 

 friable sandstone cover the surface, whose age is perhaps doubtful, as 

 they afford no palseontological or distinctive lithological evidence of their 

 true position. Quaternary deposits occur along the steeper mountain-slopes 

 and in the eroded basins and depressions of the plains, but are of such 

 slight importance that, except along the broad river-bottoms, they have not 

 been designated on the geological maps. 



