VOL. XVII. (2) INFERIOR OOLITE -CHIPPING NORTON 215 



The Scissum-Beds are typical and quite easy to locate and 



date. . J -J. J 



The Conglomerate-Bed is a most interestmg deposit, and, 

 it should be particularly noticed, contains " dark pebbles," 

 which serve to differentiate it from other conglomerate-beds 

 in higher subdivisions. Also, it should be observed, that if 

 this deposit were absent, it would be difficult on a cursory 

 inspection to separate the Scissum-Beds from the Hook- 

 Norton Beds. 



The beds below the Conglomerate-Bed contain plant- 

 remains only rarely ; but those above, not infrequently, and 

 at certain horizons, as in bed 19, even abundantly. 



Mr Walford did not identify any stratum in this section 

 with his Trigonia-signata-Bed, but Mr Paris and I are of opinion 

 that bed 12 is on its horizon. 



SwERFORD Quarry.— This quarry (lo) is known locally 

 as " Bennet's Quarry " and has been briefly described by Mr 

 Walford.' 



No. 10. SWERFORD QUARRY ■ , , • . 



i.iKj. 1.^. ^ K. Thickness in feet ins. 



( . 4. Os^rea-Clay (in pockets). Clay, dirty-yellow; 

 Ostrea abundant . . • • • • • • 



Clay, stiff, dirty-brown, passing down into 



[^Horizon of "Nearan Slates" (Walford) of 

 Langton Bridge]. 

 Bituminous Clay. Clay, black and bluish- 

 grey, tough, brownish at the base : 6 ins. 



to 2 'ft ^3 



(Beds 7 to 12, incl., absent). 

 \2] ^ Cyathopora-bourgeti-Bed. Dirty grey- 

 white marl with bluish-grey (weathering 

 white) concretions ; Perna mytilotdes : 

 6 ins. to . . • • • • • • ■ • ^ 



Lower Neriniea-Bed. Limestone, grey, 

 sandy, with specimens of Nerincsa. Ostrea 

 and Perna mytiloides common on the nether 

 surface, which is irregular; Protocardia 

 buckmani (M. & L.) : 11 ins. to . . • • i 3 

 (Bed 15, the Astarte-Bed, absent). 

 P Bottom-portion of Walford's bed 4]- 

 Exelissa-'Lm\estonQ. Limestone (similar 

 to that at Sharp's Hill), very shelly . . o b 

 (Beds 17 and 18, bed 18 being the Perna-Bed, absent) 

 19 and 20. [5], Clay, brown and yellow: i to 6 ins. o 3 

 2oa. [6], Rubbly, sandy rock and reddish-brown 

 sand passing down into the bed below : 3 

 ins. to I ft ° 7 



m 



13 



14. 



16. 



I Ouart Tourn. Geol. Soc, vol. xxxix. (1883), P- 231- ^, , 



\ fSe numbers in square brackets refer to Mr Walford's record. 



