THE SCIOTO ILLINOIAN LOBE 493 
This tongue-like extension of the ice pushed eastward to the point 
where the valley turns to the north; a tributary from the east which 
joins the major at its bend to the north, being in line with the feeding 
ice, was blocked also. The ice reached northward but a short dis- 
tance beyond this angle; a few drift knolls mark this brief position. 
A halt of considerable duration was made after the ice had retreated 
to a position bringing the north side of the valley tongue directly 
across the valley; here it built a marginal ridge averaging go to 95 
Fic. 5.—Moraine which marks the terminus of the Hanover valley dependency. 
feet high, at no point lower than 70 feet, and about 500 feet broad 
at the base (Fig. 4). A terrace of similar development marks the out- 
line of the ice against the walls of the valley elsewhere, except in front 
of the tributary valley, mentioned above, through which most of the 
drainage from the ice was led east to the Rocky Fork valley. It is 
evident that the Rocky Fork drainage had gained control of the 
mature valley long previous to its being occupied by this ice. 
These moraine terraces, best developed on the south side of the 
valley, are very conspicuous. Commencing across the valley from 
