50 G. F. Wright—Glaciated Area of Ohio. 
1. Big Beaver Creek, in sim d Socclm emerges from the gla- 
ciated re ion at Chewtown, in wrence county. ere, the 
terrace is, according to White, 160 ‘feet above the level of the 
stream, and is strewn with granitic boulders. At the junction 
of this stream with the Oh 10, fifteen or twenty miles below, the 
terraces are remarkable and instructive. The highest is from 
280 to 300 feet above the Ohio River. The towns of Beaver 
above the level of the Ohio. The composition of that part of 
this terrace occupying the angle upon which Beaver City 
is built, and down stream from the junction, differs remarkably 
from that upon which Rochester is built, on the angle up stream 
from the junction. In the angle below the siintion the terrace 
is composed of rounded pebbles of quartzite, gneiss and gran- 
ite, many of them even near the surface being a foot or 
two in diameter. In the angle abice the junction, granitic 
sega are exceedingly rare, and pebbles of any kind more 
- than two or three inches in diameter are scarce. The ex- 
planation | is evident. To use Prof. Dana’s term when speak- 
ing of the Connecticut River (see this Soucnal Dec., 1881, 
. 466), the Ohio is the great distributer, and the Beaver 
is here the principal contributor, of drift material. The Ohio 
’ does not itself have direct access to bowlders which have been 
transported by glacial ice. The drainage basin of the Beaver 
is, however, icin with glacial débris; and, as the granitic 
Passing now in order ‘from east to west, — more important 
terraces of the various streams of Ohio as they emerge - 
the glaciated area, are as follows: the measurements unless 
otherwise indicated, were made with a hand level, and in most 
cases the uncertainty can scarcely be more than a few inches: 
2. The Middle Fork of Little Beaver emerges from the glaciated 
area at New Lisbon. The terrace here shows no distinct stratifi- 
cation bbles from 10 to 15 inches in ‘diameter are numerous ; 
the heft above the river at railroad station is 36 feet ; and it 
extends, with some interruptions, five miles down the river to 
near Elkton, but at a diminished height. These terraces are 
extensively mined for kidney iron ore. Granitic pebbles are 
bundant. At Teegarden, five miles above, the channel is nar- 
rower ; the terrace, 48 feet; material, very coarse, some of the 
pebbles being four feet in diameter. 
8. Hast Branch of Sandy Oreek.—This is a branch of the Tus- 
carawas, which empties into the Muskingum. At Hast Roches- 
