286 The American Geologist. November, i,h95 
along the ice front; and there are indications that tiie 875 
foot level would establish a water connection along the foot of 
"the knobs" from Vanceburg through the eastern part of 
Flemming, Bath, Montgomery and Clark counties. Sufficient 
topographic data are wanting to establish this point conclu- 
sively; but the falling olt' of the land with the dip along the 
eastern flank of the Cincinnati anticline is very pronounced, 
so that the Waverly formation rises abruptly into knobs 1,100 
to 1,300 feet above sea level, from a Devonian black shale base 
that is about 700 feet above the same datum line. 
The accompanying provisional map is constructed with a 
view to showing the probable flooding efl^ect of a glacial dam 
following the line of the terminal moraine in its southwest 
trend throvigh northern Kentucky. 
That such a dam would account for the phenomena de- 
scribed seems a reasonable hypothesis, and if limited to the 
rivers mentioned might receive more than a provisional ac- 
ceptance. How is it with the Green and Cumberland rivers? 
With a view of determining this a special trip was taken re- 
cently to the headwaters of the Green river and to the Cum- 
berland river where it emerges from the CUimberland plateau. 
Green river barely reaches a hight of 1,000 feet above the sea, 
and that onl_y at the base of Green River knob, where one of 
its head tributaries rises. It lies the lowest of the four great 
rivers of Kentucky whose courses lie mainly or wholly within 
the boundaries of the state. Chester sandstone caps the top 
of this knob. It is almost the extreme eastern limit in the 
reach of this formation. There is no trace of the conglomer- 
ate here or of its having been here. In keeping with this fact, 
no quartz pebbles could be found in the same relative situa- 
tion as on the Kentucky and Licking. The evidence of sub- 
mergence here is largely of a negative character, unless tlie 
*'hill top silicitted fossils," referred to by Shaler as evidence 
of extensive denudation, have a difl^'erent interpretation. 
Crossing over to the Cumberland in the vicinity of Mills 
Springs, the evidence of submergence becomes very pro- 
nounced. A 3^ellowish red sandy loam filled with quartz peb- 
bles was found covering all the country back from the river 
several miles. The highest level noted for these deposits was 
300 feet above the present stage of water (880 feet above 
