VOL. XVII. (2) INFERIOR OOLITE— CHIPPING NORTON 



207 



No. 3. SHARP'S HILL QUARRY' 



Thickness in 



1. Reddish soil : 6 ins. to i ft. . . 



2. Rhynchonella- and Ostrea-'Bed.. Marls, yel- 



lowish, clayey, crowded with oysters 

 and specimens of Rhynchonella : Camp- 

 tonectes annulaius (Sow.) . . 



\t: 



f 3. Clay, brown and dirty greenish-grey at the 



top, darker towards the base- : about . . 

 Ostrea-C\a.y. Marly clay crowded with 

 whitened oysters 

 Clay, tough, dark-brown and greenish : 6 ins. ^ 

 Intermittent bed of brown sandstone; o to 2 ins. I 

 Clay, tough, bluish, passing down into green 

 I ish-blue and yellow-streaked clay, and this 



V again into bed 6 : I ft. 10 ins. 



[Position of beds [2] to [6] of Langton Bridge [teste Walford)] 

 6. Bituminous Clay. Clay, black (in places al- 

 most a coal-seam), constituting a particu- 

 larly noticeable horizon and usually over- 

 lying a seam of rich-brown clay : 2 to 8 ins. 

 [Beds 7 to 10 of Walford should come here, but Mr 

 Paris and I did not detect them). 



11. Vivipariis-MB.T\. Marl, pale-purplish, with 



numerous pebbles and concretions, some 

 ochreous, others phosphatic — the whole 

 deposit having an appearance best colloqui- 

 ally described as " like an ash-heap." Vi- 

 viparus langtonensis (Hudl.)," Atapkrtts 

 labadyei (d'Arch.), Nerineea spp., etc : o to 



1 ft. 4 ins. . . 



[This deposit rests, where present, upon an un- 

 even surface of bed 12). 



12. Upper NerincBa-'B&A. Limestone, generally 



a hard bed, but more rubbly in places and 

 sometimes passes into a whitish-grey mail. 

 Also appears to be a lenticular deposit in 

 the quarry-face (Aug., igio), but re-ap- 

 pears at the extreme western end as an 

 intermittent limestone-bed. Large Neri- 

 ncea of eudesi-type common, N. cf. voltzi 

 Desl., Nerita minuta Sow. at the base, Cor- 

 bula buckmani Lyc.,^ rctica loweana (M. and 

 L.) dwarfed form, Gervillia waltoni Lye, 

 Ostrea, Volsella imbricata (Sow.), etc. ift. 



2 ins. to 2 ft. 



1 Near Temple Mill, quite close to Sharp's Hill, is a quarry in which the sequence of beds 

 displayed is similar to that at Sharp's Hill. At the top is the Rhynchonella- and Ostrea-'&ei. About 

 6 inches of clay separate this from the Ostrea-C\ay , while below this are clays black at the top and 

 bottom and of a tea-green hue in the middle. The clays above and below those of tea-green colour 

 contain iron and weather a rusty colour. Below come similar beds to those at Sharp's Hill, only the 

 Upper .Vcrm<?a-Bed is not nearly so prominent (often only lumps of limestone embedded in marl) and 

 the Cyathopora-bourgeti-Bed is thinner and contains fewer concretions. 



2 At Temple-Mill Quarr\' an irregular limestone-band is present in the middle of bed 3. 



3 V. langtonensis was recorded by Hudleston in his Monograph from Sharp's Hill, Castle Bam 

 and Langton Bridge. He remarks that it resembles Paludina scotica Tate (Q. J. G. S., vol. xxix., 

 pi. xii., fig. 3). The species resembles V. aurelianus Grossman (Bull. Soc. G6o\. France, 3ieme 

 s^rie, vol. xxvii. (1899) p. 141, fig. 4 and page 565, pi. xvii., figs. 2-7), but the spire is more pro- 

 duced than in that species. V. aurelianus is from the " Bradfordian." 



P2 



