38 BULLETIN OF THE LABORATORIES 



however, enters a narrow gorge a few miles east of Newark 

 even before it leaves the county limits. No attempt is made in 

 Mr. Read's work to correlate these preglacial channels. 



The South Fork of the Licking flows with a sluggish cur- 

 rent over a broad alluvial plain which is covered with a black 

 lacustrine deposit of several feet in thickness. This is especially 

 true of that portion lying between the Licking Reservoir and 

 Newark. We have suggested the name Lake Licking for the 

 body of water in which these deposits were made and of which 

 the original lake in the Reservoir was a part, occupying a large 

 kettle-hole in the drift when the main body of water was drained 

 away. 



The topography of the county east of North Fork and 

 South Fork of the Licking is generally hilly. The hill tops re- 

 present a base level plain sloping slightly to the west. This 

 plain is much cut up and the high pointed hills capped with 

 carboniferous sandstone are 1150 to 1300 feet A. T. while the 

 present valley at Newark is about 800 feet A. T. 



3. The Present Channel of Licking River. 



The great valley filling at Newark indicating as it does the 

 depth of the old valley floor leads to the inquiry as to its pre- 

 glacial outlet. The present streams flowing from the north, 

 south and west meet near the centre of the county and start 

 due east. Plate IV represents at the left hand margin the con- 

 fluence at Newark. The heavy dotted line indicates the posi- 

 tion of the rocky hills. For a few miles east of Newark the 

 Licking flows on the southern side of a broad valley which is 

 filled with heavy drift accumulations on the north side as indi- 

 cated by the dotted portions on the plate. The relative thick- 

 ness of the deposit is indicated by the density of the shading. 



This valley is occupied by the P. C. & St. L. Railroad, 

 the Ohio Canal and the B. & O. Railroad. About seven miles 

 below Newark the drift reaches such a thickness on the north 

 side and extends into the valley so far that it reaches across to 



