262 Wisconsin Academy of Sciences, Arts and Letters. 
much more strongly resembling kame moraine and outwash 
deltas and at the same time much more difficult to explain 
otherwise, than anything I had been able to note in the article 
to which he refers. 
I think it but justice to myself to say that there are two 
considerations which weaken the force of the negative argu¬ 
ment based on the absence of limestone from the deposits. 
One is the abundance of chert in the limestone, which is 
very abnormal. Although the porportion of chert is not as 
great as in the cap of the west Blue Mound, a comparison with 
it would not be altogether inapt. So far as my very limited 
observation extended, limestone debris is rather scanty even on 
talus slopes where it would naturally be looked for. 
The other is that chert fragents not preceptibly deangulated 
are quite abundant several miles from the present source of 
supply. They look as though freshly torn from the ledge. 
Inasmuch as chert, when it forms solid, continuous strata 
of considerable thickness as it does here, is, in the process of 
weathering, left to form the out-jutting ledges, the limestone 
only showing in the re-entrants, it seems but natural that it 
should have been chert rather than limestone that a glacier 
should have taken as its tribute. 
The vicinity of Tomah is very rich in interesting features. 
But their complexity to which much of the interest is due ren¬ 
ders them difficult of description without much more of de¬ 
tailed study than I have thus far been able to give them. 
In what has preceded I have confined my remarks to such 
features as are more or less closely related to the question of 
local glaciation, but I wish to add that both the possibly glacial 
and the admittedly non-glacial deposits of the region combine 
to furnish an interesting chapter in Pleistocene history. 
My purpose in giving this somewhat lengthy introduction 
has been in part to present an outline of the present status of 
the question and at the same time to show the place which the 
features that I am about to describe hold in the general scheme. 
I have selected these features for special description because 
on account of their proximity to my home and their openness 
