1884.] Vestiges of Glacial Man in Minnesota. 603 
yellowish red tinge. After a certain degree of exposure the dif- 
ferential color line fades out, perhaps through the washing into 
the edges of the excavation of foreign material. Still it has been 
found to be set up anew at every fresh cutting. 
At present everything indicates that these Little Falls quartzes 
were originally posed upon an ancient surface, since covered by 
what the glacialists term modified drift, now forming all the 
upper part of the terrace-plain. It will be remembered that the 
quartz chips and implements discovered by Professor Winchell, 
in this vicinity, are contained only in the upper stratum of the 
terrace-plain. Now the notch quartzes do not at all appear at 
the terrace top, and cannot have been derived from it. They are, 
on the other hand, confined strictly to a single thin stratum of 
the lower gravels closely overlying till, and sometimes, perhaps, 
merging into it on the west, as hereafter explained.. Hence the 
two sets of objects cannot be synchronals, though they may have 
been produced by the same race at different stages of its exis- 
fence. The notch quartzes must of course be older than those 
of the Superior stratum of drift by at least the lapse of time re- 
quired for forming and draining the deposit lying between the 
Qartzes below and those above. 
sR Professor Chamberlin, State geologist of Wisconsin, in treat- 
mg of the ancient vegetal deposits of his district, precisely indi- 
_ Stes what at the present moment appears to be the glacial posi- 
| ses the Little Falls quartz stratum. Speaking of the Kettle 
3 moraine of Wisconsin, which is continuous with the northeast 
_ ‘Moraine of this region, he says: 
“Some of these organic strata lie at the immediate foot of the 
: “ge beneath fluviatile and lacustrine deposits that, I am con- 
| men to be accumulated during the accumulation of the 
ne and through the agency of glacial floods.” 
Be ovations recorded above are offered in their present 
ki ea answer to inquiries and suggestions propounded 
They niter, from time to time, by archzological investigators. 
7 are likewise adduced as evidence that the theory of an 
vec, , uartz-paved surface is not the result of a mere hasty 
eda 15, on the contrary, the slow outgrowth of many par- 
remain ons and deductions. Certain of these, however, 
i. z to be stated. The facts above given will, it is hoped, 
EE 
the successive steps by which the present 
