The Carhoniferoiis Limestone of West Cuviberland. 77 



slopes coinciding with the clip of the strata, which is usually to 

 the west or south-west. 



The drainage of the area is for the most part post-glacial, the 

 Rivers Keekle and Ehen crossing or running along the sides of faults 

 indiscriminately. Two outcrops appear outside the tract of country 

 mentioned. One is at Overend, H miles south-east of Whitehaven, 

 where the First, Second, and Third Limestones have been pushed 

 up through the Millstone Grit and Coal Measures ; and the other 

 is at Wilton, a mile east of l^]gremont, where the Seventh Limestone, 

 isolated amid Lower Palspozoics, has been saved from denudation 

 by slight synclinal folding. The Whitehaven Millstone Grit and 

 Coal Measures border the limestone tract on its western side for 

 the greater portion of its length. 



The Carboniferous Limestone Series and Millstone Grit 

 OF W. Cumberland. 



Table I. — •Litholooy. 



Thickness. 



Millstone Grit . 

 First Limestone . 



First Shale 

 Second Limestone 

 Orebank Sandstone 



Third Limestone 

 Third Shale 

 Fourth Limestone 



Fourth Shale 



Fifth Limestone 



Sandstone and Shale 

 Sixth Limestone 



Thin Beds. 



Coarse grits with quartz-pebbles and 

 felspar-fragments. Sandy, mottled, 

 and finely laminated black shales, 

 fossiliferous. Thin coal, 4 in.-O . 



Dark blue-gre}' limestone : towards 

 top tliinly bedded with sinuous but 

 persistent bedding-planes ; lower 

 portion massive. Occasional small 

 veins of barytes .... 



Thmly laminated shale with thin coal 

 and sandstone .... 



Dark blue-grey limestone, thick- 

 bedded ..... 



Fine-grained micaceous sandstones 

 with one or two coarser bands ; 

 becomes largely dark shales in N.E. 



Reddish-grey crmoidal limestone 



IMottled shale, sandy and micaceous 



(For sub-divisions and characters see 

 Table IlL) . . 



Green shales, sandy mudstones, and 

 micaceous sandstone 



Upper portion (A) white or reddish- 

 grey limestone usually much 

 jointed ; separated from dark blue- 

 grey lower portion (B) by thin 

 mudstone. Pseudo-breccias in (B) 



L'^pper portion thinly bedded sandstone, 

 with finely laminated black 

 fossiliferous shale in lower portion 



Blue-grey limestone, thick - bedded, 

 with pseudo breccias, much divided 

 in places by black shales of variable 

 thicknesses .... 



Nodular limestone with thinly bedded 

 limestones, shales, mudstones, and 

 calcite-mudstones 



S.W. N.E. 



ft. ft. 



60 120 



40 60 



12 14 



14 24 



40 70 



12 15 



6 S 



2.58 312 



14 24 



50 70 



14 24 



54 70 



10 20 



