272 Wisconsin Academy of Sciences, Arts and Letters, 
The deposits themselves by their forms and positions, seem 
to confirm this belief. The one last described however—on 
the scarp—eonld only he explained as the result of super¬ 
glacial drainage, being not only entirely removed from the 
direct action of a glacier occupying the circ, hut on account of 
its peculiarly regular and sharp outlines impossible of forma¬ 
tion by random rolling fragments, although there is no great 
interval between it and the marginal deposit of the circ. 
RECAPITULATION. 
Bearing in mind the hypothesis under consideration, that 
the deposits are survivals of normal talus, We note: 
1. That they have a constant character at whatever horizon 
they occur, and differ from the normal talus of any horizon, 
and are sharply distinguished from it in section. 
2. Normal talus, even under the most favorable conditions, 
shows no ability to survive the disappearance of the source of 
supply. 
3. The topographic features with which some of the deposits 
are associated, are not only not especially favorable; they are 
notably unfavorable for the display of survival, because they 
assume an extreme and in every way improbable endurance. 
4. The deposits are shown to be relatively recent. 
G. H. Squier. 
Trempealeau, Wis, s March 30, 1907. 
i It is a somewhat surprising fact when we consider the great volume 
of water supposed to have passed down the Mississippi at its terrace 
stages, that by far the greatest share of the river’s work in eroding the 
shore has been done at or near present river level, in this vicinity at 
least. There is indeed a rock terrace at 40' to 60 r above present 
level, hut its manner of forming rentrants at the openings of the valleys 
seems to show that it was an old gradation plain slightly modified by 
the river during its higher stages. Being lower than the upper terrace 
it is invisible away from the river but wells occasionally offer traces 
of it. 
These are indications that a deep channel was maintained between 
the bluffs at Trempeleau, which did not become filled with deposits 
even during terrace stages. 
