THE DRIFTLESS REGION OF WISCONSIN 831 
ridge stretching across the valley or not. Less than a quarter 
of a mile east of this valley is another small one descending 
from the west side of the principal bluff. It first leaves the 
Frgute Se 
FMM 
Sec.3 
UME: 
Sec.6 
WA || 
Sérd rock Loose Sard meen beds Clay 
Fic. 2.— Section near Trempealeau, Wis. Scale about 240 to an inch, except 
in Sec. 7, which is about 65" to an inch. Datum, river level, except im Sec: 7; 
confinement of the hills on the west side, at the same time 
changing from a nearly westerly to a southerly direction. Along 
this west side a large ridge of heavy bowlders is superimposed 
on a sandstone table. As the sandstone table falls away toward 
