'''^hi Yorkshire, Derl>T/sIi'ue,&c. 09 



^Other opportunityV occupy the coast in succession to near 

 'Marsk, and where the great eastern fault that has been men- 

 tioned above, seems at once to cut off and conceal from the 

 'sight, all the itrata (that have been mentioned p. 96 and 97 

 above), between these and the Red Marl with Gypjum beds, 

 of which there are said to he large quantities near 10 the 

 Tees, N of Lazenby in Kirkleatham : whether these Red 

 Marl strata occupy all the north-west side of the great 

 fault that I have supposed and mentioned, turn its W 

 corner and proceed on the W side of Thirsk, where I have 

 been told that Gypsum is dug, as before hinted, T am un- 

 able to say, any more than whether, the magncsian Lime- 

 stone, that is described in Mr. John Bailey's excllent Report 

 on Durham County, as overlying the great Newcastle 

 Coal-series from near Sunderland to near Piersbridce on 

 the Tees, is an immediate under-measure to the Red Marl, 

 that I have been speaking of? and whether it be the same 

 ■with the Nottingham, Derby and Yorkshire ma^nesian or 

 Yellow-lime Rock? and wliether these actually connect, by 

 v/ay of Knaresborough, Ripon, Bedale, E of Richmond, &c. 

 as I have been told by some is the case? are questions on 

 which I am exceedingly desirous of accurate information ; 

 and would take the present opportunity of mentioning, that 

 the lower or calcareous part of the Newcastle scries, as de- 

 scribed by Mr. Bailey, and by Mr. Westgarth Forster (see 

 his " Section of the Strata") seem, in the blending of Grit- 

 stone, Shale, Coal-seams, &c. with the Lin)estones pro- 

 ducing Mineral Veins, to differ so essentially from the 

 lower, or indeed any part, of the Derbyshire series, as to be 

 with the utmost difficulty referred to the same part of the 

 general-series, as hinted in the note, p. 80, of your last 

 number. 



Whether, in case of the identity of tlie magnesian Lime 

 Rocks and their under Coal-measures in Derby and Dur- 

 ham being established, the great fault that enters the island 

 near Hartley in Northumberland (see the Map affixed to the 

 " Picture of Newcastle,") by turning more southward, after 

 re-entering that County N. of Ebchester, may range across 

 Durham and the North Riding of Yorkshire, to connect 

 perhaps with the great zigzag fault of my Derbyshire Re- 

 port and p. 32 of your last number, (on which I have more 

 to say herein), and thereby entirely cut off and disconnect 

 the upper and lower parts of what Mr. Forster has joined 

 together as one surits, perhaps about the 244th fathom o. 

 his Section, being the place where Mr. W. Miller's engraved 

 G 2 Section 



