VOL. XVII. {z) INFERIOR OOLITE-CHIPPING NORTON 223 



Lyneham-Barrow Quarry 2. — In the quarry numbered 

 (43), most of the Hmestone exposed is Chipping-Norton Lime- 

 stone. At the extreme north-west corner, however, are later 

 beds. They comprise, in ascending order, marl with Placunopsis 

 socialis M. & L. abundant, overlain by brown and bluish clays 

 with sandy patches and " sooty " (wood) inclusions (beds 19 

 and 20), and then pale yellow marl and stone 8 inches thick 

 (bed 18), which adheres to the base of Great-Oolite limestones 

 similar to those exposed in the preceding section (42). 



The 8-inch bed is important. It is in part of remanie 

 nature, containing Strophodus magnus Ag., Homomya, Ostrea, 

 Trigonia, Perna, Rhynchonella , etc. The occurrence of speci- 

 mens of Perna is important, because it shows that the marls 

 with Placunopsis below are on the horizon of the Lower 

 Placunopsis-^Qdi. 



Castle-Barn Quarry. — This section (44) is best known 

 in connection with the Viviparus-M.AxV- which is replete with 

 specimens of Viviparus langtonensis (Hudleston). 



No. 44. castle-barn quarry 



Thickness in feet ins. 

 Prominent bed of irregularly-fissile, oolitic, shelly 



limestone : seen . . . . . . . . . . 20 



Ostrea-'Bed. Marl, dirty yellow, and dark clay : 



Ostrea . . . . . . . . . . . . 06 



Limestone, sparsely-oolitic, flaggy-bedded, except 

 at the bottom where there is a massive bed (i ft. 

 3 ins.) splitting on exposure into a rough tilestone 

 (c/. Stonesfield Slate). The under surface is ir- 

 regular and has pebbles embedded in it . . . . 56 



(Non-sequence). 

 C (II- Vivtparus-Ma.Tl. Marl, white, indurated, sparsely- 

 2 -S 1 oolitic; iuW oi specimens oi Viviparus la7tgtonen- 



^ m ) sis (Hudl.), passing down into a brownish-white 



'Z ( marl (8 ins.) with which is associated greenish clay i 8 



{Beds 12 to 20, incL, absent). 

 g|= , ("2 to II Limestone, brown oolitic, more massive at the base 6 6 

 '||||] 12.- Limestone, very hard, "knotty" .. .. .. 10 



gZJi^ [ 13 to ? Limestones, massive, with sandy partings : seen . . 60 



In quarry 45 there is a trace of greenish clay belonging 

 to the Neseran Beds, as at Padley's Quarry, resting upon oolite, 

 whose granules have been separated by dissolution to resemble 

 a marl-deposit at a distance, and soft enough for rabbits to 

 burrow in. Below are more massive limestones. 



I H. B. Woodward "The Jurassic Rocks oi Britain," vol. iv. (1894), p. 153. 

 Q2 



