of the Diluvial Currents in Yorkshire. 141 



The thii-d rock is ftilly as remarkable and local as either of 

 the others. It consists of pebbles of light-coloured mountain- 

 limestone, united together by red sandstone into a conglo- 

 merate provincially called brockram. This occurs in situ, 

 sometimes alternating with red sandstone, abundantly about 

 Kirkby Stephen, in Westmoreland, as at Stenkrith Bridge, 

 where the Eden has forced through it a romantic and beauti- 

 ful channel. 



I have observed pebbles of this curious rock at Scotton, 

 south-east of Richmond, and at several places on the Yorkshire 

 coast, especially at Scarborough, Bridlington, and south of 

 Owthorne, in Holderness. 



Clearly as these examples seem lo indicate that over parts 

 of Cumberland, Westmoreland, Yorkshire, and Durham, the 

 principal force of the diluvial waters was exerted in an east- 

 ward or rather south-eastward direction, they are not the only 

 ones which lead to such a conclusion. Analogous instances 

 will occur to every one who examines the great variety of 

 boulders which are found in several parts of Yorkshire, espe- 

 cially on the coast of Holderness, and in the neighbourhood of 

 York. 



But in both these localities we find fragments of rocks that 

 can only be supposed to have been transported by a different 

 current flowing from the north. The large blocks of limestone, 

 trap, millstone-grit and other sandstones, coal, and magnesian 

 limestone, which appear on the coast of Holderness, may well 

 be admitted to have been derived from north-western York- 

 shire, wheie such rocks abound. But mica slate with garnets, 

 which nowhere occurs in the Cumbrian mountains, is probably 

 derived from Scotland ; the radiated fetid limestone clearly 

 claims origin from Building hill near Sunderland, and the lias 

 fossils have been rolled from Whitby : these effects seem to 

 require the admission of a powerful southward flow of waters ; 

 and, in the Vale of York, lias fossils from the north, chalk 

 and oolite fragments from the north-east, are mixed with the 

 debris of rocks washed from the north-western part of the 

 county. 



Perhaps, on a future occasion, I may offer some additional 

 statements on this subject, not undeserving the attention of a 

 Society which, in consequence of its possessing a fine series of 

 the remains of antediluvian animals procured in the neigh- 

 bourhood ol" its museum, must feel a particular interest in the 

 progress of geological opinions respecting the deluge. 



XXVIII. Pro- 



