IOWA ACADEMY OF SCIENCES. 
213 
GLACIAL MARKINGS IN SOUTHEASTERN IOWA 
BY FRANCIS M. FULTZ. 
In the third annual report of the Iowa Geological Survey 
Dr. C. R. Keyes has treated, at considerable length, of the gla- 
cial scorings in Iowa. Among others, several localities were 
given from Des Moines county, of which two were described 
somewhat in detail by the present writer. Since the above 
mentioned article was prepared a somewhat more extended and 
minute search has been made, with the result that several other 
localities showing glacial scratches have been discovered. Also, 
some attention has been given to a study of the phenomena 
accompanying these markings, with a view of determining the 
general direction and sequence of the ice streams. It is scarcely 
to be doubted, from the great variation in the direction of strias, 
that the ice flow from time to time changed its course. While 
all markings show a northwest and southeast trend, some of 
them are very nearly north and south, others very nearly east 
and west. Again, it is commonly accepted that these scratches 
were necessarily made by the ice moving from somewhere in 
the north and west; but there is good evidence to show that this 
territory was once invaded by the ice from the Huron district 
moving through Illinois. 
First, let the localities heretofore known and described from 
this section be briefly mentioned. From the vicinity of Bur- 
lington: by White, S. 15° E. ; by Keyes, S. 63° E.; byLeverett, 
S. 65° E. ; also by the present writer at points near West Bur- 
lington and at Kingston. As already mentioned, the last two 
exposures mentioned have been fully described elsewhere. The 
one at Kingston is at the very top of the bold bluff which bor- 
ders the flood plain of the Mississippi. It was brought to light 
by the changing of a small water course, and exposes a glaciated 
surface 100 feet in length and 25 feet in width. It shows the 
top platform of rocks to have been planed off perfectly level. 
