134 Geological Society. 



Dec. 21. — Henry Holland Stutzer, Esq. River-Terrace, Islington, 

 was elected a Fellow of the Society. 



The reading was begun of a paper tf On a group of Slate- Rocks 

 in Yorkshire, between the rivers Lune and Wharfe, from near Kirby 

 Lonsdale to near Malham, by John Phillips, Hon. Mem. of the Leeds 

 and Yorkshire Philosophical Societies." 



1828. Jan. 4. — John Murray, Esq. Jun. of Albemarle Street 5 

 Henry Tuffnell, Esq. of Chris tchurch, Oxford 5 The Right Hon. 

 Viscount Cole, of Christchurch, Oxford j R. C. Fergusson, Esq. 

 M.P., of Craigdarroch, Dumfriesshire, and of Great Cumberland 

 Street j John Phillips, Esq. of York, Hon. Mem. of the Yorkshire, 

 Leeds, and Hull Philosophical Societies ; and John Gurdon, Esq. of 

 Assington Hall, Suffolk, — were elected Fellows of the Society. 



The reading of Mr. Phillips's paper begun at the last meeting, was 

 concluded. 



The object of this paper is to describe the geological structure and 

 relations of a group of rocks which the author characterizes as " aber- 

 rant from the slate district of Cumberland," and extending about 

 fifteen miles towards the east under the summits of Greygarth, Ingle- 

 borough, and Pen-y-gent, — a tract remarkable for the variety and sin- 

 gularity of its geological appearances, among which the proofs of 

 dislocation are peculiarly striking and important. 



To this description a sketch is premised of the slate-series of the 

 Lakes of Westmorland and Cumberland, where the rocks are grouped 

 in three principal divisions, the lowest consisting of dark soft slate 

 much contorted, with fine-grained gneiss beneath it passing into 

 granite. The second division occupies a country of very different 

 aspect from that of the slate. The mountain-ranges being marked by 

 abrupt precipices, as at Helvellyn, Langdale Pikes, and the Lakes of 

 Ulswater, &c. and composed of brecciated argillaceous rocks contain- 

 ing calcareous spar, green-earth, and calcedony, with greenstone and 

 other forms of trap. On the south of this chain is a tract of transi- 

 tion limestone, containing caryophyllia, products, spiriferae, and other 

 fossils ; and this is covered by a third zone of slate, the most recent 

 rock of the country, usually divisible into rhomboidal blocks, of which 

 two principal varieties are observable, alternating with each other; the 

 one homogeneous and fissile, and containing organic remains spa- 

 ringly distributed, of the genera trigonia, pecten, gryphea, turritella 

 terebratulaj — the other more granular and micaceous. This forma- 

 tion is in some cases succeeded by red conglomerate, but more com- 

 monly by mountain-limestone, the lowest beds of which contain nu- 

 merous pebbles of slate and quartz ; and above the limestone are the 

 carboniferous rocks, including the millstone grit and the upper coal- 

 measures. The highest strata known in the country, consist of the 

 new red sandstone, placed in an unconformable position above the 

 coal formation. 



The tract, which is the more immediate object of this paper, extends 

 from the valley of the Lune in an easterly direction, to that of the 

 Wharfe. Along its middle, from Casterton Fells to a few miles east 



of 



