2IO PROCEEDINGS COTTESWOLD CLUB 1911 



The Viviparus-Msirl, however, is not continuous through- 

 out the section. It indicates a change, and in places the non- 

 sequence between it and the underlying deposits is far greater 

 than at Sharp's Hill. At Castle Barn (44), for example, it 

 rests directly upon the Chipping-Norton Limestone. 



The Ostrea-Cldiy and Rhynchonella- and Ostrea-^ed. are 

 difficult deposits to deal with. When, as is usually the case, 

 the clays with oysters are close to the top of a section, it is 

 difficult to say if they represent the Ostrea-QA^cy or the Rhyn- 

 chonella- and Os^rea-Bed. The presence or absence of speci- 

 mens of Rhynchonella constitute the main guidance. In some 

 sections the RhynchonellcB are seen to be associated with speci- 

 mens of Terebratulce of the group colloquially spoken of as 

 the " T .-glohata-Gron^ ." 



Near Whichford is a quarry (75), in which such a Rhyn- 

 chonella- and Ostrea-^Qd, containing specimens of " T. globata," 

 is close down upon the Swerford Beds ; only deposits com- 

 parable with those numbered 19 and 20 at Sharp's Hill separate 

 them. The limestones in this quarry are very much disturbed. 

 Sometimes in large blocks and sometimes flaggy, they are at 

 others reduced to a yellowish sand. Also in places they are 

 highly ferruginous — especially the top-layer, which is probably 

 on the horizon of the Plant-Bed of Sharp's Hill. 



The quarry numbered 76 is in hmestones, which are, how- 

 ever, less ferruginous. 



LoNG-CoMPTON Quarry. — The Chipping-Norton Lime- 

 stone is worked in a quarry (77) on the hill to the north of 

 Long Compton. The upper portion of the hmestone has been 

 reduced to a sand ; but on top of it, the extremely ferruginous 

 equivalent to the Plant-Bed may be descried. Waters, rendered 

 chalybeate from this stratum, have percolated the " sands," 

 and have imparted to them a rich rouge colour. Above the 

 Plant-Bed equivalent is reddish-brown sand, then a tough, 

 dark clay (4 ins.), with pieces of limestone rich in specimens of 

 Placunopsis, and next reddish-brown sand again : the three 

 layers being equivalent to beds ig and 20 of Sharp's Hill. 



