Lansing Pleistocene Geology. — IVinchell. 295 
I agree with Mr. Upham in believing that the Wisconsin terraces dis- 
appear under the present flood-plain long before reaching the latitude 
of Lansing. 
3. The remnant of loess-like sediment in which the tunnel is dug 
is in a protected place at the point of a ridge forming the bluff of the 
Missouri \'alley bounded on the west by the small tributary gorge 
joining the main tributary at right angles. The situation is one where 
a portion of the general sedimentary envelope would be protected from 
the erosion of these small tributaries, but where it would be impos- 
sible for it to accumulate by creep or wash from higher elevations. 
The least which can be supposed is that provided for in professor Wil- 
liston's explanation, which involves , general, deposition on the margin 
of the Missouri when it was flowing fifty feet higher than now. But 
4. The character of the lower three feet of the sediment in the 
tunnel in which the skeleton is said to have been enveloped, as you 
have described it, is such that its accumulation must have preceded the 
entire period of loess deposition. 
My only doubt has been as to the exact position of the skeleton 
with reference to this pre-loessial portion of the deposit. I notice in 
Mr. Upham's account that he says "the skeleton was imbedded in the 
upper foot of a stony and earthy debris that appears to have fallen 
from a closely adjacent outcrop of Carboniferous limestone which also 
in a heavy bed forms the floor of the tunnel ; or perhaps the bones 
/'a_v in a slight holloiv of the debris." I should like a little more spe- 
cific information as to whether the skeleton was really enveloped in 
the pre-loessial deposit or simply lay in a hollow on top of it. 
G. Frederick Wright. 
APPENDIX B. 
It was through the renewed courtesy of Mr. J. \\ Brower, 
president of the Ouivira Historical Society, that the writer 
made recently his third visit to the Concannon farm. He spent 
two full days at that place, and was accompanied and aided 
by Mr. Joseph Concannon in making some observations on the 
walls of the tunnel and on the river blufifs above and below the 
farm. These observations are more in detail than any that had 
been made before by the writer, and they serve to elucidate 
more fully the geology of the place as sketched above. Sub- 
quently Mr. Michael Concannon furnished the photographic 
print seen in plate XATH, made from a negative taken bv 'Mr. 
M. C. Long, showing the face of the tunnel prior to the work 
done by Mr. Fowke. 
At nine places detailed sections each carrying about four 
feet were made of the west wall of the tunnel (Stations A to 
