CHAPTER L. 
SHU REAL Wer) BOT, Olay 
DRIFT IN THE SECOND GEOLOGICAL DISTRICT. 
The Drift in the Second District may be divided into two classes—the 
original Drift, composed of bowlders, gravel, etc., often found on high 
eround in the north-western part of the district, and the modified valley 
Drift, constituting terraces along certain streams. 
The first is a part of the general outspread of drift found throughout 
all the northern and north-western States, and popularly known as the 
Drift. It is found over the whole of the north-western portion of the 
Second District, and along the hills bordering the Hocking River, some 
distance below Lancaster. Scattered bowlders have been found in the 
western part of Vinton county. South of the Ohio River a considerable 
area covered with Drift is found near Ashland, Boyd county, Kentucky. 
This was first observed by Sidney 8. Lyon, of the Kentucky Geological 
Survey. Here the Drift is pretty high in the hills, perhaps two hundred 
feet above the low water.of the Ohio. 
The eastern lamit of the Drift is a line running nearly north-east and 
south-west through Muskingum, Perry, Fairfield, and western edge of Vin- 
ton counties. If, however, we take the Kentucky deposit into the account, 
the line will be almost a north and south one. A single quartzite bowl- 
der was found in Washington county, on a ridge between the Muskingum 
River and Duck Creek, about three hundred feet above the former stream. 
This bowlder may have been taken from the valley Drift on the banks 
of the Muskingum, and carried to the top of the ridge by human agency. 
The bowlders of the general Drift are often found on very high ground, 
from two hundred to three hundred feet above the principal valleys. In 
some regions they are quite numerous, and very large. In the vicinity 
of Lancaster they are found at elevations two hundred and fifty to three 
hundred feet above the Hocking River. On the slopes, and near the top 
of Mt. Pleasant (an old river hill, with bold cliffs on the western and 
northern sides), on the high ground between Lancaster and Rushville, 
and on the high lands on the west, which divide the waters of the Hock- 
ing and Scioto rivers, large bowlders are abundant. Many are also 
found in valleys which contain no modified or valley Drift. Over the 
