298 | GEOLOGY OF OHIO. 
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ridges the aber is largely beech ; on the lower land, oak, ae black | 
oak, etc. 7 ee 
The surface Drift in other parts of te county preele a great variety 
of features, a few of which may be briefly noticed. In Peru township 
the bed of Huron river is about one hundred and thirty feet above the 
Lake, the bluffs generally composed of modified: Drift—a gravelly clay © 
_ loam, with the debris of limestone rocks abundant. These bluffs rise to 
the height of from one hundred and eighty to two hundred feet above the 
Lake, and are much modified by surface erosion. Receding from the river, 
the surface rises to two hundred and twenty feet above the Lake, being 
undulating, much eroded and presenting 1? appearance of a water plain; 
soil rich in lime and humus. 
At Greenfield Center the barometer marked an elevation of eens 
dred and ninety feet above the Lake. The surface of most of the town- a 
ship is covered with irregular undulating hills of gravel and Drift. 
The following is a section of the Drift banks of the branch of Huron 
River, west of Steuben : : 
FY. 
1. Modified Drift, Noe deel of stratified sand and clay, with debris of 
igranivelamestone, and localirockseeescn eae see eee ee eee eee (25 
Ree MOPAVOL ch eis Ou ae Bit a Ocal ABS gl ye Land I RNs BANG cease Uy & to 6 
3: Blue boulidercclays mum's tira title ders ne omer a veer ny Wea am a eaps ne 12 
Westward the surface is a broad table-land, rising to the height of 
three hundred and forty feet above the Lake, with irregular valleys of 
erosion, and continuing to the west line of the county. The rock formas, 
tion is deeply buried under the Drift. 
Near the center of Townsend township, the following. section of the 
Drift is disclosed in sinking wells: 
yg Soll eee ses ae Posiess Gabe Boneoo DEO OSaRreron SSeceSGcesmrsscesessos | C0) 3: 
Zan BOULOR Clay Gini gure asian eater (ale se Enel een a cera eaen DLE UNG 4 to 12 
3. Laminated clay with thin layers of gravel ...--...---.---.--:.--- 2 to 6 
A. 
Coarse water-bearing gravel, the thickness of which is not ordina- 
) rily ascertained. : 
The lowest stratum yields an abundant supply of excellent water, 
which in places rises to the surface and flows in a steady stream from the 
mouth of the wells. Water obtained above this horizon is of poor quali- 
ty, rendered impure by the minerais contained in the Huron shales, the 
debris of which are largely mingled with the Drift. 
In Greenwich township the north and south center road, south of the 
Cleveland, Columbus, Cincinnati and Indianapolis Railroad, passes over 
level clay lands at an altitude of four hundred and eighty-five feet above 
the Lake, presenting the appearance of a broad water-plain, and resem- hy 
ce 
