Vol. 68.] SUCCESSION m the nohth-west oe England. 515 



and the fossils are here entirely recrystallized. The bedding is 

 throughout obscure, and the lithological changes abrupt. The rock 

 is not well exposed, and so the mutual relations of the different 

 outcrops are difficult to determine. It is possible that portions 

 of the rock represent a breccia similar to that exposed at Halton 

 •Green described below, derived from several horizons. 



Fauna, 



Lithostrotion portlocJci (Bronn). 



Athyris ylanosulcata (Phill.). 

 Productus costatus Sby. 

 Frodiocius martini Sby. 



Vitgnax pugnus (M.n,Yt.). 

 EetictUaria lineata (Mart.). Common . 

 Spirifei^ bisulcatus Sby. 

 Spirifer cf. dupUcicostiis Pliill. 

 Spirifer cf. striatus Fischer. 



This fauna, although scanty, shows a close resemblance to 

 that collected from the Botany Beds in the Middleton-in-Teesdale 

 District, and certainly represents beds high up in the Bibunophyllum 

 Zone. 



The Halton-Green Inlier. — The exposure near Halton Green 

 appears to belong to the same general horizon as that at Swantly, 

 and to have been brought into its present position by the same set of 

 ■earth-movements. It affords, however, a much better section, and 

 throws a great deal more light on the origin of these interesting 

 inliers. The beds are exposed in an old quarry in Halton Park 

 high up on the right bank of the Lune Valley. The exposure 

 consists of two portions. In the western corner, the quarry has 

 been excavated in a compact, nearly barren, stratified limestone ; 

 while in the weathered portion close to the limekiln we find an 

 intensely brecciated mass, composed of angular and subangular 

 fragments, many of which are rich in fossils : these, however, are 

 usually rather fragmentary and badly preserved (PL XLIY, fig. 2, 

 facing p. 486). The fossils are not distributed regularly through 

 the breccia, but are confined to certain blocks, many of 

 the fragments being quite unfossiliferous. The breccia indeed 

 appears to be derived from several diff'erent beds of limestone, 

 and to represent a crush-breccia on a large scale. It resembles 

 in many respects that described by Mr. Tiddeman from Winter- 

 "burn and elsewhere in the knoll-reef country near Gargrave ^ ; 

 and it is highly probable that the blocks belong to the series 

 of crystalline limestones which, as shown by Dr. Marr, are 

 characteristic of the knoll-reef country south of the Craven Fault," 

 and that they owe their present position to the series of thrust- 

 movements which that author has suggested as having taken place 

 in connexion with the Middle Craven Fault in the neighbourhood 

 ^f Settle. 



^ Trans. Leeds Gaol. Assoc, pt. vi (1891) p. 111. 

 '' Q. J. G. S. vol. Iv (1899) p. 339. 



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