Eskers of flw Kiins(fn Epoch. — Hershey. 203 
appear and continue the belt to its extreme end on the west- 
ern county line, northwest of the village of Kent, and onl}^ a 
few miles back from the outer drift margin. But that por- 
tion of the belt which lies west of the heavy deposit at Bolton 
cannot be traced continuously and ispoorl}?" developed, so that 
the belt may be terminated properly at Bolton village. Its 
length, with this limitation, is twenty miles. The aggregate 
amount of material which it contains is several times as 
great as that of the Adeline belt, but it is scattered over a 
greater width ; and, except at a few points of special develo])- 
ment, it does not show such a marked topography. Conse- 
quently, while the Adeline deposit has been frequently de- 
scribed and discussed, no mention has been made of the similar 
belt in the Pecatonica and Yellow creek valleys. 
The most characteristic features of the Pecatonica belt are 
(1) its compound nature, there'being almost invariably two 
and sometimes as many as five parallel ridges, which may be 
traced often for half a dozen miles, when they either diverge 
to the branch belts or die out altogether; (2) the size of its 
material, averaging finer than in any other main belt of the 
district; and (3) the suddenly increasing development which 
the belt presents at distances of every few miles. 
The Cedarville belt. — Deposits belonging to this belt are 
first met with in the valley of the Rock run about one and a 
half miles east of Rock City. It trends thence west-southwest, 
but as it is obliged to pass across an elevated tract of coun- 
try, and as it is much mixed up with another class of drift 
phenomena (knolls of angular fragmental limestone), it can- 
not be definitely traced until it reaches the valley of Cedar 
creek. Thence to its western end it is very distinct, consisting 
of a single "ridge" which is marked by a line of cone-siiaped 
mounds. Southeast of Cedarville there is an area of special 
development where it rises into sharp knolls 80 or 90 feet in 
hight. Here it has obstructed the ancient valley of Cedar 
creek, compelling the stream to cut a gorge on the north side 
of the village. The next area of special development is in the 
angle formed by Cedar and Richland creeks near their junc- 
tion. West of the latter stream it is compelled to cross a high 
rock ridge, and upon its descent into and crossing of the val- 
ley of the Pecatonica river, it is found to have made a rather 
