﻿Vol. 66.~] LIMESTONE SOUTH OF THE CEA.VEN FAULT. 548 



List of Fossils obtained. 

 Camilla aff. cornucopia, Mich. 

 Caninla aff. glgantea, Mich. 

 Campophyllum caninoides, Sibly. 

 Cyathaxonla cornu, Mich. 

 Syrlngopora ef. reticulata, Goldf. 

 Michellnla aff. megastoma (Phill.). 

 Lophophyllum, sp. nov. (?). 



Productus pustulosis, Phill. (One large 

 weathered-out specimen obtained.) 

 Product us glganteus, Mart. 

 Splrlfer blsulcatus, Sow. 

 Spirifer strlatus. Fischer. 

 Rhipldomella mlchellnl (L'Eveille). 



% 



Swinden Gill Head Quarry. — This quarry lies a little south 

 of the Blackburn & Hellifield Railway, near the head of the 

 eastern branch of Swinden Gill. Here massive limestone dips 

 north-north-westwards at an angle of 20°. Shale bands are some- 

 what more abundant than at Warrel ; still, they are quite sub- 

 ordinate. Chert is fairly common. Fossils are tolerably common, 

 and there is plenty of loose rock lying in the cutting. 



List of Fossils obtained.'' 



Productus humerosus, Sow. 

 Chonctes paplllonacea (Phill.). 

 Chonetes comoides (J. Sow.). 

 Orthotetes crenlstrla (Phill.). 

 Rhipldomella mlchellnl (L'Eveille). 



Euomphalus sp., and other small 

 gasteropods not yet determined. 



Mlchelinla aff. megastoma (Phill.). 

 Syrlngopora cf. reticulata, Goldf. 

 Caninla glgantea, Mich. 

 Cyathaxonla sp. 



Productus semireticulatus, Mart. 

 Productus martini, Sow. 

 Productus fimbrlatus, J. Sow. 

 Productus glganteus, Mart. 



Trilobites are occasionally seen. 



Notes. — Syrlngopora is not rerj common. Caninla glgantea is quite 

 common. (It has been identified for me by Mr. R. G. Carruthers.) 



Productus glganteus is the Chonetes-like form common at Warrel Quarry. 

 Chonetes paplllonacea has a characteristic purplish colour, which is also seen 

 at Warrel and at other exposures that appear to be on nearly or quite the same 

 horizon. Orthotetes crenlstrla is the most abundant brachiopod ; it seems to 

 be exactly like the Warrel form. Rhipldomella mlchellnl is fairly common. 



There are two other small cuttings close at hand, which show the 

 same massive limestones, with approximately the same dip. 



Across the small stream, and about 40 yards away, are three 

 small exposures of shales, which Dr. Wheelton Hind unhesitatingly 

 put down as Pendleside Shales. 1 The dip is still the same, and 

 there is no indication of faulting. Accepting the dip as 20°, the 

 thickness between the massive limestones and shales of the quarry 

 and the shale beds will be about 120 X sin 20° (41 feet) ; con- 

 sequently the limestones would seem to be nearly at the top of the 

 1 massif/ 



The shales contain Cyatliaxonia sp. nov. and Caninla cornucopia 

 mut. nov. (fide E. G. Carruthers). Pygidia of Phillipsia sp. are 

 common. Brachiopods are rare and dwarfed. I found fragments 

 of a small Ortlioceras. 



The same shales, with the same general dip and strike, are seen 

 in Swinden Gill, and they seem to be undoubted Pendleside Beds. 2 



1 Dr. Wheelton Hind visited this quarry, in company with the author, in the 

 spring of 1906. 



2 Quart. Journ. Geol. Soc. vol. lvii (1901) p. 359. 



