4 
56 G. F. Wright—Glaciated Area of Ohio. 
to 150 feet above the stream. It is pretty clear that the ice did 
not extend into this portion of the valley; but it certainly 
surmounted the hills to the north, and all the small streams 
coming down from them must have been gorged with water 
from the melting ice. At Bainbridge, twelve miles southwest, 
on the creek the terrace is twenty feet above the flood plain, 
and contains great number of pebbles four or five inches 
through, and occasionally a granite bowlder four feet through. 
14. hio River does not havea continuous terrace. ‘The 
towns of Ripley, Higginsport and New Richmond, above Cin- 
cinnati, are built upon gravel deposits that are about sixty feet 
above low-water mark. 1ese towns were all flooded in Janu- 
ary last. The upper portion of the old part of Cincinnati is, 
however, upon a glacial terrace that is about sixty feet higher. 
The junction of the Miami with the Ohio below Cincinnati, is 
characterized by gravel deposits of enormous extent. The val- 
ley is here from three to four miles wide, and above Aurora, 
near Lawrenceburg, is bordered upon the west by a terrace whose 
surface is seventy-eight feet above the flood plain of the river, 
upon which Lawrenceburg is built, and 112 feet above low- 
water mark. The terrace is here from one-fourth to three- 
fourths of a mile in width. The gravel deposit upon the Ken- 
ce 
CONCLUSION. 
It is not best at present to speculate too freely upon these 
facts. Hach of these tributaries to the Ohio should be care- 
_ fully studied through its entire course, and much remains to 
be done upon the Ohio itself. Enough, however, appears to 
give new interest to the whole question of the glacial period, 
and to raise the hope that the amount of erosion afforded b 
the streams of the interior will afford some additional evidence 
concerning the date of the close of the glacial period in Amer- 
ica. The full report of my last summer’s work, with more de- 
tailed maps, will be published by the Cleveland Historical 
Society, whose friends have borne my expense in the field. 
