Si DESCRIPTION OF THE STRATA. 



Bridge rocks, it does not follow the oolite immediately, but with some 

 other beds intervening.* 



5. Several beds of calcareous sandstone, or sandy limestone ; 

 from 12 to 15 feet. 



6. Shale, alternating with thin beds of sandstone; from 20 to 

 30 feet. 



7. Shale; about 50 feet. 



Below the shale is the hard bed which is the next member of the 

 series, occupying the foot of the cliff, and forming a strong barrier, 

 to defend the whole from the fury of the ocean. 



The beds No. 6, as well as No. 7, may be considered as belong- 

 ing to the second shale; in which, as has been observed, there are 

 frequently beds of schistose sandstone. Indeed, the upper part of 

 the shale is found in some instances, to alternate with the lower beds 

 of the series above it; as we see in the bank opposite Kirkham priory, 

 where a bed of the shale occurs even above the marly sandstone. 



It will be seen, in the preceding sketch of the strata at Scar- 

 borough castle, that there is no bed there over the shale, correspond- 

 ing exactly with the siliceous sandstone on the shore near Cayton; 

 but it is well known, that the sandstone beds vary exceedingly. 

 Besides, in proceeding from Scarborough castle to the north-west, 

 we soon meet with siliceous sandstone over the shale, similar to the 

 sandstone of the White Nab. 



It is scarcely necessary to add, that the thickness of the beds, 

 stated above, is not given from actual admeasurement; but is merely 

 intended to furnish some idea of the relative proportions of the beds. 

 The whole height of the rock is said to be about 300 feet. 



* A mistake has been inadvertently made in page 74, in mentioning the localities of this 

 limestone; it being tliere intimated, that it does not occur at Kirkdale church. Tiie aulhors 

 did not find it in tlie channel of the stream, opposite and above llie church; that being occupied 

 by tbin beds of calcareous sandstone, as stated in page 69: but they met with it in a higher 

 position at the ford below, and at a quarry ou the north-west side of the church. 



