Mr. Hutton's Notes on the New Red Sandstone, ^c. 73 



dip is 15° south, whilst the dip of the Coal Measures is twice this 

 amount, or about 30°. It is satisfactory to know, that this has been 

 proved by the working of the High Main Seam below, because it would 

 appear that the dip of the Coal seam and Shale bed which were found 

 in the quarry did not differ much from that of the Red Sandstone ; 

 nevertheless, I am perfectly borne out by the personal observation and 

 practical experience of Mr. Wood, in considering the Red Sandstone here 

 " in general position clearly unconformable with the Coal Measures." 



The relative position of this patch of Red Sandstone will be best un- 

 derstood by a reference to the annexed diagrams. In the sketch. No. 

 1. the line A B. represents the course of the High Main Coal Seam, on 

 the north, or low side of the Dyke, having the depth marked at which 

 the Coal has either been worked, or proved to exist, at seven different 

 points ; and shews the remarkably undulating line each bed takes, by 

 the unequal depression of portions of the strata. I have taken the Hio-h 

 Main Coal, as the representative of the whole series, from its beino- best 

 known, but the continuous line exhibited, although sufficient for our 

 present purpose, is incorrect, as many slips or dykes occur, throwing it 

 down in portions unequally. 



No. 1. 



^&^^^M. 



^orth or dip side of the Uiike. 



The amount of " throw" caused by the Dyke at the points named in 

 the diagram No. 1, will be nearly as below :— 



At Whitley. Earsdon. Backworth. Under Closing Killingworth Gosforth. Kenton. 



Hill Quarry. West Moor. 

 \mfaihs. I50faths. 160 faths. UOfaths. 175 faths. 170 faths. 120 faths. 



* The depth at which the High Main Coal is worked in Whitley Colliery, on the north 

 of the Dyke, IS, by mistake, stated to be 50 fathoms, in the 4th vol. of Geological Tran- 

 sactions, page 25. 



VOL. I. T 



