GLACIAL WATERS IX THE LAKE ERIE BASIN 8l 



that was built wholly in Whittlesey waters. Other fillings up the 

 creek toward Porterville and Wales Center had similar origin. 



Marilla. The valley filling at Marilla and farther up the valley 

 of Little Buftalo creek were contributed b}- the glacial drainage 

 from the east, but apparently at the Warren level. This would 

 seem to have been the earliest of the glacial stream deltas to form 

 at Warren level. 



Cowlesville. The filling in Cayuga creek valley at and below 

 Cowlesville was carried in by the glacial streams which cut across 

 from the Attica (Tonawanda) valley on the east. This delta was 

 probably at first in local waters held higher than the Warren. 



West Alden and Alden. The extensive sand areas forming the 

 bars at the Aldens were laid down in Lake Warren b}^ the glacial 

 overflow from the Tonawanda vallev along the line of the Erie 

 Railroad and past Darien. 



Fargo. The extensive gravel plain south and southwest of Fargo 

 station on the Delaware, Lackawanna & Western Railroad was 

 wholly deposited by the glacial drainage from the east along the 

 course of the railroad. 



Batavia. The plain on which the village stands is a detrital 

 filling and perhaps leveling of morainal gravels in shallow waters 

 of the Tonawanda valley. The drainage was across from the 

 Oatka valley, bringing the overflow of the Genesee valley and 

 other eastern valleys [see p. 31]. 



Deltas of land-stream drainage; existing streams 



The deltas of this class were formed at any or at all levels in the 

 valleys in which were standing waters receiving contributions from 

 land drainage. Theoretically this drainage had no relation to the 

 ice front, and is in continued existence today. But practically 

 the deposits contributed by these land streams can not be always 

 discriminated from the same work in the same locality by the 

 glacial drainage. The two classes of streams were at work together, 

 and when a valley was receiving detritus from both glacial and 

 land drainage we should expect that the bulk from the latter source 

 would be dropped at the head of the bay, or wherever the land 

 stream had its mouth. When the glacial drainage ceased, the 

 land stream had no rival and was at liberty to spread its detritus 

 over all the delta area. We should regard the land stream detritus 

 as constituting the up valley portion and the superficial part of 

 many deltas, with variations depending, however, on the local 

 conditions. 



