332 GEOLOGY OF OHIO. 
The river here flows through a broad valley of alluvium, containing 
pebbles, and resting upon a deep deposit of water-washed gravel. An 
old deeply excavated channel opens southward at C, the mouth of Big 
Run, now filled at the surface with sandy material. At A a narrow 
channel is filled with the original Drift, which has been carried away at 
the surface by recent erosion, but not down to the present water level. 
The encroachment of the river at this point exposes a clean section of 
this original deposit, as given below: 
SECTION OF OLD VALLEY Drirt, Bic RUN. 
Fr. 
Yellow clay. with Drift bowlders and pebbles, and many flat fragments of 
loGal recks 3222/2522 eRe ee WL Re, Ses LE OMe Ee ean ea CUR 
Blue bowlder clay unstratified, with rounded granitic bowlders, gravel, and 
angulariracments Ole lacial rocks eee ee nena ere nae 20 
sLaminatedubl ne clayene seme eeeeer setae eee ease eee eee ere BE eEEaaAne 3 
Coarse stratified gravel ences Sa5 Sere ee a Ai ec enna eee ee a 4 
Coarseistratified sand -ecerskeat as cose ne pete eee eee eee ee eee eeeree 2 
Yellow lamin ated clay. ota te sc eile ee lanes ae ct cole Mi yA jaa ile Sarena ae 2 
Blne lamina tedtelays aes ciple eye ayer e aioe ety torte fala ee atte ar 2 
= ae 
eed MEU NS tabled yO wld Orn Clayaeieti arse eee rere ee ee are eT aTeone 4 
O2OSED? a ~ 
Stratified: sand andvgravels aco cte creer ep nae ania ohet re ee are noe re eee 8 
At Mt. Vernon, wells sunk in the alluvium pass only through sand 
and gravel. Those on the'sandy slopes strike— 
UN, 
de tVellow: Clayrc sos a sateen meee see a teete pe ee age ret ere rere eee 10 to 15 
rub lMe CLAY eee oe cr Ba i URE a ot aa eee aes ct Pen 30 to 40 
3. Gravel, sand, and broken stone to bed rock. 
That part of the county east of the Baltimore and Ohio Railroad and 
north of the Cleveland, Mt. Vernon and Columbus Railroad, consisted 
originally of a high undulating table land, covered with glacial Drift. 
Erosion has intersected it with narrow ravines, and filled it with small 
streams, leaving a succession of wellgrounded hills of very graceful out- 
line, characteristic of the Waverly in this part of the State. This pecu- 
liarity is only modified by outcrops of the Waverly Conglomerate. Where 
this is wanting, or is below the bottoms of the valleys, the hills are en- 
tirely without benches; the lines of the landscape are all graceful curves; 
