TILL-LIKE DEPOSITS SOUTH OF KANSAS RIVER 
63 
and from three to seven miles south of Eudora, are interpreted 
by the writer as being till. 
The three chief outcrops, all of which are in road cuts, are lo- 
cated as follows: 
1. SW. cor. NW. }i sec. 21. R. 21 E., T. 13 S. 
2. SW. cor. sec. 9. R. 21. E., T. 14 S. 
3. ^2 mile east of exposure 2. 
The material at these places is exposed in road cuts from 100 to 
200 feet long and three feet deep. In all cases the drift is com- 
posed of a brown more or less sandy to sticky clayey material 
thoroughly leached and containing numerous pebbles and boulders. 
Some stratification is at places in evidence. The coarser materials 
consist chiefly of red quartzites, well decayed granites, brown 
to white cherts, gneisses, schists and sandstones. In size, the 
pebbles average less than one-half inch in diameter. The larger 
boulders, which are more numerous at exposure 2, measure over 
one foot in diameter and consist for the most part of red Sioux 
•quartzites. 
In all cases the till is exposed on gentle slopes leading down 
to young valleys. A loesslike silt covers the till-like materials in 
most places and in some instances small pebbles of quartzite, chert 
and quartz are included in the overlying cover. The immediate 
country is relatively flat with few shallow valleys cut in it. Be- 
cause of this topography exposures are very few and in most' cases 
nothing but the siltlike material appears at the surface. 
INTERPRETATIONS OF THE DEPOSITS 
To account for the presence of these deposits several interpre- 
tations may be presented : 
1. The material is in situ having been deposited by the Kan- 
san ice sheet which advanced farther south than is indicated by 
the position of the mapped glacial border according to Todd. 
2. The material is in situ having been deposited by a tongue of 
the main ice mass rather than by the ice sheet itself. 
3. The material is not in situ having been brought to its pres- 
ent position by debris-laden icebergs floating on a lake or in the 
current of a stream, or having been deposited as outwash. 
View i. Country south of Kansas river glaciated. — Ac- 
cording to this hypothesis, the Kansan ice sheet crossed the 
valley of Kansas river and advanced southward at least as far 
as the two southernmost outcrops. The deposits, therefore, repre- 
sent till in situ. Whether the entire ice mass crossed the valley, 
