in Yorkshire f Derbyshire, &fc. 97 



Wintringham, and there it disappears under the waters of 

 the Humber, and afterwards under the Peat and Gravel 

 (as 1 understand) but proceeds beneath these until they 

 abut against the creal eastern fault, somewhere SW of Pock- 

 lington, and are no where afterwards ?een northward in 

 Great Britain, I believe*? The Sand, Limestone and gray 

 Slate of Colli/ U'eston, the Burnack Rag-stone and Clay, 

 the Bedford Limesloiie and Clay, and the great C/z/wc/j Clay, 

 (Derby Report i. 1 13), the IVnburn Sands and Clays, &c. 

 above it, and the Aylesbiny or upper Oalile Limestone, all 

 in like manner range successively to the Eastward, and are 

 I believe, cut off obliquely and abut on this fault (perhaps 

 under Gravel and Peat) W and NW of Pocklington : the 

 Clialk-marl being perhaps the only stratum beneath the 

 Chalk, that preserves its connection past the corner of the 

 ouier or easternmost raised tract of strata (p. 29 of your 

 last number), and aher basseiing at Birdsal (under Tottern- 

 hoe Slone), occupies the space between the Chalk, east and 

 south of it, near Seliring ton, Thorpe-Basset, Wintringham, 

 West Heselton, Shcrburn, Potter's Brompton, Ganton, 

 Folkton, Hunmanby, and the S end of Filey Bay : and 

 the Oalite which it overlies on the west and north Sec. 

 sides, near Langton, North-Grimstone, Settrington, Nor- 

 ton, Old Malton, Amotherby, Barton, Sionegrave-Ness, 

 Nunnington, Harain, Nawton, Webburn, Sinnington, 

 Wrelton, Aislaby, Pickering, Thornton, Wilton, Ebbcrs- 

 ton, Snainton, Brompton S, West-Ayton S, Scamer, 

 Cayton, Lebbcrlon, and Filey S. 



Two circumsiances seem to conspire, to prevent the. 

 tracing of the Malton or upper Oalite Limestone far soutli 

 of that town, viz. the low and flat alluvial surface of the 

 country and llie corner of the large lilted and denudated 

 tract that I have mentioned above, and 1 am not acquainted 

 with any place where this Rock is conspicuously displayed S 

 of this, in Yorkshire, or in Lincolnshire, as n)entioned above: 

 north of the corner of this lifted tract, this Rock forms 

 quite a feature of the country, formii5g the surface in a large 

 tract of very hiijh and at present barren and heathy moors, 

 principally, that stretch out to within seven miles of North- 

 allerton ; which extraordinary stretch of strata near the top 

 t)f the British series, so far to the west, seems occasioned 

 by a trough, or natural depression of the strata rather, pcr- 

 iiaps, than to tilts by faults, which may be traced froai<4he 



• Does Scotland produce any strata of ova-formed Limestonef 



Vol. 39. No. 166. Pei'. 1812. G Yak 



