Vol. 57.] PENDLESIBE GKOUP AT PENDLE HILL, ETC. 369 



Feet. Inches. 



Dark sbale 20 



Hard limestone 6 



Shale , 4 



Hard limestone 9 



Carbonaceous shales 1 



Light grey fossil-limestone several yards 



Orinoid-beds 100 



The railway-cutting from bridge no. 74 to the tunnel, shows beds 

 slightly above the foregoing, and gives 30 to 40 feet of dark cal- 

 careous shales, enclosing bullions and lenticles of hard dark lime- 

 stone with Aviculojyecten -papyraceus^ Posidoniella Jcevis, GlypTiioceras 

 hilingue, and Gl. reticulatmn. The officers of the Geological Survey 

 indicated, however, a fault running parallel to the railway, though 

 we have been unable to find any trace of its existence. 



A fairly complete section of the series from the Coal-Measures to 

 the Carboniferous Limestone is found at Congleton Edge (Cheshire), 

 details of which were published in a paper by Mr. Walcot Gibson 

 and one of us.^ In this area the chief fossiliferous bed is a shale 

 with large bullions : but at times it consists of a hard, compact, 

 dark limestone showing conchoidal fracture and occurs below the 

 Third Grit. Lower down, and nearer the top of the massif of lime- 

 stone, a series occurs of thin limestones with shales containing the 

 Pendleside fauna, well-developed. 



Beds yielding the typical fauna are to be seen in the River Dane, 

 a quarter of a mile east of the viaduct, and farther north, about 

 2 miles south-east of Macclesfield, on the stream-courses near 

 Sutton. The same beds are well exposed in the stream east of 

 Bosley Minn, which shows the bullion-bed and its associated lime- 

 stones. 



The higher bed of this Group, very rich in fossils, is exposed on 

 the southern bank of the Dane, a little distance west of the salmon- 

 ladder ; but here the bed has slipped, owing to disturbances, and is 

 almost vertical. These beds have yielded the usual Pendleside fauna: 

 the cavities of the cephalopods are full of a mineral oil. 



The Dane and its tributaries at Bosley afford good sections of 

 the Group, bullions yielding the same fauna and fish-remains. 



The evidence of the sequence of strata between the northern 

 boundary of the limestone and the Kinderscout Grits is none the less 

 apparent, though complicated by erosion and landslips. Eossil 

 evidence and the peculiar nature of the limestones demonstrate the 

 presence of the Pendleside Group between Lose Hill, Mam Tor, and 

 Trey Cliff. In the Edale Yalley, too, the beds are exposed in the 

 streams from about a quarter of a mile east of Edale-Head House 

 to 1 mile beyond Edale Chapel, the characteristic Pendleside fossils 

 also occurring. 



The shales at the base of Mam Tor have yielded Aviculopecten 



' 1 W. Gibson & W. Hind, Quart. Journ. Geol. Soc. vol. Iv (1899) pp. 548-55. 



