C. A. White on Drift phenomena in S.W. Iowa. 301 
Art. XXXII.— Observations upon the Drift phenomena of South- 
western lowa; by C. A. Wuire, M.D. 
[In advance of his final report upon the Geology of Towa.] 
d. No opportunity has since presented itself to Bere 
those observations, but I think I am not mistaken in the recol- 
lection that there was but one set of scratches, which were 
b] 
them are often seen in various parts of the state. 
uring my official labors last season, although considerable 
attention was given to the drift deposit, no similar traces of gla- 
cial phenomena were ever discovered until I reached the Mis- 
souri river in Mills county, where, on section 16, township 71, 
range 43, west of the fifth principal meridian, very distinct gla- 
cial scratches were found’upon limestone of the Upper Coal- 
Measures, not far from the middle of the series. 
The locality is upon the western abrupt slope of the bluffs 
which border the bottom land of the Missouri river. The river 
being distant nearly three miles to the westward, the exact height 
of the scratches above it was not definitely ascertained, but it is 
Probably not much less than one hundred feet above the ordi- 
the state of Iowa, although boulders with similar scratches upon 
e 
this locality were both granitic and metamorphic. The were 
d iated faces were observed upon 
ute a number of them, thus as nearly as possible detecting 
them in the very act of scoring the rocks in situ. eget 
he scratches here are in two sets, a coarser and a finer; 
those of the latter more numerous than the former, but those 
J —Srconp Serres, Vou, XLIII, No. 129.—Mar, 1867. 
39 
A ree 
