138 The American Geologist. September, 1901 
aliont 150 feet above the ordinan- level of the Missouri river; 
and the overlying loess rises onward to a hight of 200 feet, 
or more, above the river, within another eighth of a mile,, reach- 
ing there the general level of the top of the river bluffs and 
adjoining uplands. 
According to the surveys of the ^Missouri River Com- 
mission, the extreme low and high stages of the river here 
during the period from 1873 to 1885 were respectively 735 
and 760 feet above the sea level, the vertical range being 25 
feet/^ The extreme high water was in 1881, being the highest 
within the thirty-live years since Mr. Concannon settled here ; ^ 
but it was exceeded, probably six or seven feet, by the high 
water of 1844, of which, a record was made at Kansas City. 
The skeleton was at a hight of 11 to 12 feet above the high 
water of 1881, or '/'/2 feet, nearly, above the sea; and the 
house is about 35 feet higher, with the limestone outcrop 
extending from near it up to about 900 feet above the sea, 
W'hile the higher crests of the loess near by are at 950 feet, 
estimated approximately. 
The coarse debris in the lower part of the tunnel contained, 
so far as we could observe, no glacial drift pebbles or stones 
of foreign origin, though they are frequent in the thin gla- 
cial drift which overlies the rock surfaces near. Many of 
these drift stones and boulders are of the red Sioux quartzite, 
which outcrops 300 to 350 miles northward, in southwestern 
Minnesota, the northwest corner of Iowa, and the southeast 
part of South Dakota. It occurs in this Kansan drift mostly 
in small fragments, but often one to two feet in diameter, and 
occasionally even measuring five feet, or more, and weighing 
several tons. The southern boundary of the glacial drift, 
marking the limit of the continental ice-sheet in its extreme 
extension during the Kansan stage of the Glacial period, is 
at a line passing from east to west, as mapped by Chamberlin 
and McGee, about 12 or 15 miles south of the Kansas (com- 
monly called the Kavv) river, and 25 or 30 miles south of Lan- 
sing.! 
Above the debris, which exhibits no marks of water assort- 
ing and deposition, the section, very clearly seen in each side 
*V. S. Geol. Survey, Bulletin V2, 1891, p. 166. 
tU. S. Geol. Survey.. Seventh .\iinual Report, for 1SS5-S6, pi. viii (map of 
tbe drift area and glacial string of the United Stated.) 
