220 DRIFT DEPOSITS OF MANCHESTER 



thereby increasing their force, and causing them 

 to sweep the deposit out. 



The valley of the Medlock in Bradford and 

 Beswick, is through Nos. 3 and 4, into the coal 

 measures ; and in Ardwick, Chorlton, and Man- 

 chester, through the same deposits, into the upper 

 new red sandstone. The beds of gravel and 

 sand found in Ardwick, Chorlton-on-Medlock, 

 and Hulme, like those of the Irk, appear to have 

 been swept out of the upper part of the valley of 

 the Medlock, but some of them may have been 

 derived from the Irwell. By looking at the map, 

 it will at once be seen that the deposit No. ], 

 extends much further on the eastern than on the 

 western side of the present river courses. All 

 these three valleys bear evidence of having been 

 formed under the sea, for the action of the present 

 streams of water which now flow in them, appears 

 to be unequal to produce the effects observed in 

 any moderate period of time. 



The small valleys in which the Cheethara 

 brooks. Shooters-brook, and Corn-brook flow, are 

 all cut through No. 3, and contain little (if any) of 

 deposit No. 1, until they reach the larger valleys. 



