312 ERWIN HINCKLEY BARBOUR 
quartzite, the largest noted being about three feet through. The 
drift is thin here, nowhere exceeding a foot or two, as far as 
observed. Upon this thin but unmistakable layer of drift lies 
some twelve to fifteen feet of loess. 
Two very tortuous miniature channels with polished and 
scored sides were noted. The curves were so abrupt that the 
striating and polishing must have resulted from the action of 
streams of glacial mud and gravel being under stress and 
driven with unusual force through the confined and winding 
channel. 
This seems to be the point farthest south in the state where 
such grooves and striae have been noted. At La Platte light 
grooves and striae have been reported in the Carboniferous 
limestone. In the Dakota Cretaceous near South Bend, Mr. 
Charles N. Gould has observed parallel grooves which may be 
glacial, or as he thinks more likely artificial, being made by the 
Indians in former times when sharpening implements in the 
sandy rock of this formation. In the spring a considerable area 
at Weeping Water will be stripped of the overlying drift and 
loess, at which time it can be examined to much greater advan- 
tage than now. 
ERWIN HINCKLEY BARBOUR. 
THE UNIVERSITY OF NEBRASKA. 
