866 



DR. W. HIND AND MR. J. A. HOWE ON THE [Aug. IQOI, 



SO thoroughly as to be incapable of permitting the fauna to live 

 any longer ? But the Craven Paiilts cannot be very extensive as to 

 throw. At the eastern end of the fault and near Hebden the throw 

 is only of very limited extent, and as far west as Malham the fault 

 is in the same series of beds. The throw of the northern fault is 

 probably greater, but is not extensive : for quarry-sections, and a 

 boring, at the base of Mr. Delaney's quarry (west of Stainforth 

 Station and south of the faults), show the following succession, 

 which was communicated to me by the Rev. A. Crofton, late rector 

 of Giggleswick : — 



Feet . Inches. 



White Hmestone, with ProducUis gigantens and ^ 

 corals 



Clay- parting ., 



Limestone, with Productus Cora 



Hard blue \m\e?Xox\Q,w\\hBeUero'p'hon,Productus 



giga7ite7(s, and corsxls 40 



Thin coal and seat-clay 



Limestone ,. 



Thin coal and seat-clay 



[At this point rise several springs.] 



Hard rock, calcareous 



Shaly parting 



Hard rock 



Clay with trace of coal 



Clay with coal 



Shale 



Hard rock 



Shale 



Hard slaty rock 



Eed clay 



Lenticles of f ossiliferous limestone 



Rock 



Rock 



Hydraulic limestone 



Clay like bard putty 



Rock and shale 



Calcareous conglomerate 



Silurian slates, nearly vertical. 



Here we see that the top of the Silurian floor south of the fault 

 is not far below the sole of the limestone-quarry. 



Another difficulty which arises, if the theory be true, is to 

 account for the great difference in the depth of deposit within a 

 distance of between 2 and 3 miles, supposing that the Great Scar 

 Limestone (only 500 feet thick below Ingleboro') is the equivalent 

 of the mass of limestone at Settle, Malham, Cracoe, and Clitheroe. 

 And, on the other hand, what has happened to the 1500 feet of 

 beds with seven thick limestones which are found in Wensleydale; 

 and why is only one limestone found between the ' massif' and 

 the grits at JBlack Hill ? 



A further difficulty arises also as to the identity of the various 

 beds of limestone in the Yoredale Series. The Grit, which caps the 

 country intersected by the great dales, forms a good datum-line 

 above : the base of the Yoredale Series, however, is variable, and the 



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