340 W. J. McGee—Drift Formations in Northeastern Iowa. 
Pieces of the soft shaly substance from the lower part of No. 
4 were found to be slowly combustible, but contained too 
much earthy matter to burn readily. Charred wood and sticks 
burned off at one end were found in this well. 
IIL A well two miles northwest from last. 
Stratification not personally observed. At about twenty feet 
a large stump of a tree identified as Red Cedar (Juniperus vir- 
gintana) was struck in one side of the well. Below it a stra- 
tum of the older glacial Drift several feet in thickness was 
penetrated. The stump retained so much of its organic char- 
acter as to render the water unfit for use when it rose to its 
level. 
IV. A well half a mile northeast from last. 
1. Surface soil. --- - Ae Ceo es et. 4 feet. 
2. Clay witha granite bowlder weighing 500 pounds ----- fat 
8. Clay with gravel ._....- nou wid Jeli 8.1% 
3 oe 
ee ee ee ee ee ad 
V. A well two miles northeast from last. 
Stratification not observed personally. At about fifty feet 
fragments of wood, one partially burned, were found inter- 
mixed throughout a hard, blackish, laminated clay. Below 
is the usual yellow clay, with gravel, sand and small bowl- 
ders was found resting on Niagara limestone. 
VI. A well quarter of a mile southeast of last. 
1. Surface accumulation 
2. (Absent, owing to denudation). 
3. Clay with gravel, sand and bowlders..--.--- .------- 16e* 
4, pe denice shaly clay, with fragments of wood, one 
isturbe 
5.§ identified doubtfully as Sumac. Disturbed by 
glacial and alluvial action .............---------- 6 “ 
: t Yellow Clay, With Bravel, etn. : 5... i. 25.5 ------ 47 
8. Niagara limestone. 
topography beneath the Forest far as it has been 
determined, is not greatly different from that of the present 
surface. The wells given are but ples of all excavated 
orest Bed or both it and the older Drift have been remov 
or modified. The interesting fact is, that the uppermost de- 
posit is in all cases the same, and is beyond the shadow of @ 
SO ee eo ere 
