eae . me General Notes. 
GENERAL NOTES. 
GEOLOGY AND PALZONTOLOGY. 
On the Glacial Flow in Iowa.—There is evidence of at least 
three ice-flows, or advances, of the glacial sheet in lowa: 
recognized by Dr. C. A. White;? and, third, from the north’ 
The evidences of these flows aré found in the striated rocks, the 
as Dr. White observes, they were probably derived from this e 
gion. e. 
“ On account of the friable nature of a considerable part of tt : 
faces which probably yet preserve such traces, we very 
ie have an Opportunity to observe them in Iowa.” * me 
Nevertheless, the surface of the upper carboniferous ees 
_ on the west side of the Missouri River, opposite Councl © 
= pe glacial scratches having a direction south, 41 o 
mS flow Jor Seem to imply the existence of a glacial cur pe 
te set te part of the glacial period, having 250°" 
Pe Nisa ogy of Iowa, p. gt, oe 
A hia, fee as we have knowledge of, at the present time, this seems to parek 
EES order of the ice-flows within the borders of this State. Ra 
__ > Nate's Geology of Iowa, p. 96. 4 Ibid., p. 93: Ibid.» f 
X 
