652 MR. W. GIBSON AND DE. WHEELTON HIND ON THE [Aug. 1 899, 



The stream thus shows a much 



more complete section than that of 



^^::^'^ w XW/M'/'^'/. % the quarry, but it is believed that 



this is in part deceptive : thus the 

 apparently thick beds of tuff seen 

 in the stream are regarded as the 

 same bed on the east and west 

 sides of the dome, and the greater 

 width of outcrop is probably due to 

 the stream following the same bed 

 for some distance along the strike. 



Towards the lower part of the 

 section the strata are thrown into 

 gentle folds. This is diagrammatio- 

 ally represented in fig. 4 (p. 553). 

 There seems, however, to be a greater 

 number of beds of tuff exposed in 

 the lower part of the stream than 

 are seen either in the quarry or 

 towards the summit of the section. 

 The stream-section places beyond 

 doubt the age of the volcanic out- 

 burst at the close of the Carboni- 

 ferous Limestone episode. 



w. 

 II 



SO 





p t3 



II II 



4. Succession between Top of 

 Limestone and Third Grit. 



{a) Brook-section in Lime- 

 kiln Wood. — In the brook-section 

 north of the quarry it has been 

 seen that the tuff-beds and thin 

 encrinital limestones are succeeded 

 by a few feet of shaly sandstones 

 and then by a thin coal. By means 

 of the sections on the mountain- 

 road leading from Limekiln Farm 

 on to the moor, and the streams 

 flowing down the northern margin 

 of Limekiln "Wood, an almost con- 

 tinuous section between the lime- 

 stone and the Third Grit can be 

 obtained. 



Near the southern edge of the 

 limestone-quarry, in the roadside 

 leading from Limekiln Farm, a coal 

 1 foot 6 inches thick, passing under 

 greyish-black shales, is exposed. 

 The dip is not very high, showing 

 that the summit of the dome is 



