IN THE ANGLO-PARIS BASIN 57 



(1926b ; 422) considered to be of benettianus Subzone age in fact marks the extreme 

 summit of the spathi Subzone (p. 51). This association is also to be seen at the 

 summit of the spathi Subzone at Caen Hill, Devizes (p. 60) and probably also at 

 Dilton Marsh. 



(ii) VALE OF WARDOUR TO DEVIZES (WILTSHIRE) 



(a) Vale of Wardour 



No sections in Middle Albian sediments are now to be seen in the Vale of Wardour. 

 A brickyard was worked throughout much of the 19th Century near Ridge and was 

 first described by Fitton (1836 ; 247) and was listed by d'Orbigny (in Geinitz 1849) as 

 ' Rudge '. Jukes-Browne (1900 ; 230), Reid (1903 ; 32, 39), and Andrews (in Andrews 

 et al., 1903 ; 158) provided further information about this section. Fitton's ' Am- 

 monites rhotomagensis ' suggests Lyelliceras lyelli indicating the lyelli Subzone but 

 the specimen has not been traced. Both Fitton and Jukes-Browne record Inoceramus 

 sulcatus as well as /. concentricus from this area and the varicosum Subzone is certainly 

 present in marls at the Watercress beds Fovant (Mottram 1957 ; 166, 1961). 



The only other sections are a well at Dinton described by Jukes-Browne & Andrews 

 (1891 ; 292 & 1900 ; 228 : and in Reid 1903 ; 31, 38), and an exposure of the basal 

 beds in Wardour Park (Reid 1903 ; 34, Mottram 1957 ; 161). Casey demonstrated 

 (1956 ; 231, 1961a ; 565) that the lower part of the sequence in the Dinton well was of 

 kitchini Subzone (Lower Albian) age and was overlain non-sequentially by clays of 

 dentatus Zone age. However, no fossils have been preserved from the clays and it is 

 impossible to determine their subzonal position. At the present time it is not possi- 

 ble to correlate these three sections with each other, or any section south or north of 

 the Vale. 



(b) Maiden Bradley to Devizes 



No sections now exist in this area of the outcrop, although brick pits formerly 

 existed at Redford Water, Flintford, Crockerton, and Westbury, all described by 

 Jukes-Browne (1900 ; 235-6). From his account of them it is possible to gain some 

 idea of the lithological sequence in the lower part of the Gault in this area (text-fig. 25) . 



The Crockerton section was worked in the early part of the 19th Century and 

 yielded to Miss Benett the holotypes of Ammonites benettianus and Ammonites 

 laevigatas described by J. de. C. Sowerby. It also probably yielded the specimen of 

 Ammonites monile mentioned by Fitton (1836 ; 258) and a good deal of the English 

 lyelli Subzone ammonites in the various collections used by Spath in his Monograph 

 of the Ammonoidea of the Gault. Until the late 1930's it was the only section known 

 in England to have exposed sediments definitely containing Lyelliceras lyelli. There 

 is now a factory on the site. 



Unfortunately, there are no detailed accounts either of this section or the others 

 mentioned above. However, Jukes-Browne's account (text-fig. 25) suggests that 

 the sequence is fairly uniform. It appears that ' Division ' 3 definitely yielded lyelli 



