358 



J. Y. BLAKE AND W. H. HTJDLE8T0N ON 



Section at Anipleforth-Beacon Quarry (east end). 



it in. 

 5' & 5. Red clay, with boulders and fragments of Upper Calcareous 



Grit filling up gaps and fissures in the limestone nothing to 10 



4'. Coral Rag — principally Thamnastraa ; the upper portions are much 

 ohalcedonized ; Cidaris florige?n?na, Exogyra nana, but few shells 



nothing to 4 

 4. Che?nnitzi a-limestones, the equivalents of the Coralline oolite, about 18 



Here the tipper portion of the equivalents of the Coralline oolite 

 has much resemblance to the intercoralline portions of the Hag, as 

 we have previously noticed with regard to the quarry at Oswald- 

 kirk. Lower down Chemnitzia and Nerincea become more numerous ; 

 and about 12 feet below the base of the Rag there is a splendid 

 mass of shells occurring in the creamy limestone with buff granules, 

 so characteristic of the Coralline oolite of this district. We noted : — 



v.c 

 c. 



r. 



v.c. 

 c. 



c. 



Lucina Beanii,Zyc. (?aliena Phil.). 



oculus, Bl. cf H. 



Astarte ovata, Smith (large, both 



valves). 

 Opis Phillipsi, Morr. 

 Pseudodiadema versipora, Phil. 

 Phasianella striata in the bottom 



bed. 



Beleinnites abbreviatus, Mill. 

 Chemnitzia heddingtonensis, Sow. 

 Nerimea fasciata ?, Voltz. 

 Cerithium muricatum, Sow. 

 Littorina muricata, Sow. 

 Cylindrites, sp. (small). 

 V.c. Exogyra nana, Sow. 

 Lima elliptica, Whit. 

 Perna mytiloides, Lam. 



The character of the fauna and the richness of the beds at once 

 shows the difference between this limestone and the Hambleton 

 oolite. It is the true Coralline oolite, on which the true Cidaris- 

 Jtorigemma Rag reposes, constant in the main to its development 

 even here on the edge of the moors, but apparently thinning out on 

 the rise from what we have seen it at Sproxton, 1 J mile north, and 

 at Oswaldkirk, 1J mile east. 



The Coral Rag (4') attains its maximum thickness in this line of 

 section towards the east end of Oswaldkirk village, where there is a 

 face of probably not less than 22 feet. In the Birch-House quarry 

 (just beyond the oast end of the section) it forms a bold precipice, 

 weathering in large, swelling, rounded masses, which exhibit much 

 Thamnastraia and Theeosmilia, with profusion of spines of Cidaris 

 Jlorigemma, plenty of Ostrea nana, Pecien vimineus, &c. Throughout 

 the village, wherever there is an exposure, we note the usual inter- 

 coralline beds, which tend to swell out the Rag. In the softer 

 portions of such beds Tercbratida insignis, Sehub., is not unfrequent. 

 In some places the upper surface is so extremely uneven as to 

 suggest tho idea of unconformability with the succeeding formation ; 

 but this is no doubt due to the Assuring and shifting of a more 

 recent date, as we find the hollows filled in with Upper Calcareous 

 Grit in a tumbled and fragmentary condition, showing that it too 

 was deposited and consolidated before such fissures were formed. 



Tracing the Coral Rag on the rise, it forms the steepest part of 

 tho hill for somo distance westward of Oswaldkirk village, and' 

 begins to constitute the surface of the plateau about quarry f 9 

 though the hollows in it are filled up by Upper Calcareous Grit and 



