148 



rocks, and those of a generally larger size, than are usually 

 met with in that deposit. It is remarkable that this bed of 

 drift, although seen and cut through on the hill side about 

 50 feet above the level of the valley, the latter below and 

 indeed all the way to Todmorden afforded so far as we 

 could discover, no more Till. In a paper read before the 

 Manchester Geological Society in 1842, and published in its 

 Transactions of the following year, the author stated that 

 he had little doubt but that some of the most ancient por- 

 tions of the drift had passed the Pennine Chain through 

 the valley of Todmorden to Hebden Bridge, by the Summit 

 VaUey above Littleborough. No doubt that some drift has 

 passed, as we have ourselves found granites and foreign 

 rocks at Hebden Bridge and at other places in the valley of 

 the Calder, but up to this time, so far as we know, no 

 deposit of Till has been found to the north of the patch 

 now described. 



Professor Hull, F.RS,, in a letter in the "Geological 

 Magazine," Vol. III., p. 474, alludes to this part of the valley 

 near where the Till is situated as affording no evidence of 

 having been excavated by the stream flowing in it at the 

 present time, and he notices the remarkable flat water- 

 shedding in the valley. Mr. A. H. Green, F.G.S,, in his 

 excellent Memoir on the Geology of North Derbyshire and 

 the adjacent parts of Yorkshire, at p. 131, when speaking 

 of the passage of the drift across the Pennine Chain, says, 

 "The valley of the Calder cuts right across the ridge; so 

 far as we know no drift is found in it at the summit level, 

 but at Hebden Bridge and at Elland boulders of granite and 

 other foreigners are found, and at the latter place in fair 

 plenty." The accompanying wood cut, Fig. 1, is a section 



