IN THE ANGLO-PARIS BASIN 91 



cliff from the D196 between St. Aubin and Laneuville-au-Pont. The section has 

 recently been described by P. & J. -P. Destombes and is quoted in text-fig. 39. It 

 forms one of the original localities cited by d'Orbigny when defining the stage (1842 ; 

 404) and is doubly important because it shows a complete sequence from the mam- 

 millatum Zone to the spathi Subzone of the dentatus Zone. 



The outline classification of the sequence is as follows. The eodentatus Subzone is 

 definitely represented within Bed 5 and may include 6 and the basal part of 7. The 

 remainder of Bed 7 together with 8 contains a lyelli Subzone fauna, Bed 8 lithologic- 

 ally represents the NE. extension of a marker horizon recognisable at the top of the 

 lyelli Subzone in the Gault of the Aube and in the St. Florentin area of the Yonne 

 (text-fig. 43). Bed 9 contains a spathi Subzone fauna. 



(d) Courcelles pres Clerey (Aube) 



This clay pit, No. 3 of the Tuileries de St. Parres les Vaudes, is situated to the E. of 

 the river Seine on the eastern side of the D 49 about 2-5 kms SE. of Clerey. It now 

 forms the most important section available in the Middle Albian sediments in the 

 Aube, and is typical of the sequence formerly exposed at such famous localities as 

 Dienville on the River Aube, and Gaty-pres Geraudot in the Foret d'Orient (Larcher, 

 Rat & Malapris 1965 ; 246). It is very close to the old section at Courcelles figured 

 by Leymerie (1846 ; pi. 3, fig. 4). The section is given in text-fig. 40, and its correla- 

 tion with sections to the NE. and SW. in text-fig. 43. It has been described briefly 

 by P. & J. -P. Destombes (1965 ; 262), and is particularly important in that it permits a 

 direct comparison to be made with the sequence in the Horton Clay pit, Small Dole, 

 Sussex (p. 35). 



Bed 1 to a metre above the base of Bed 4, are classified with the lyelli Subzone, and 

 the following list of ammonites is certainly not exhaustive and represents material 

 collected strictly in situ. Bed 1 is not very fossiliferous but has yielded Hoplites (H.) 

 bullatus, H. (H.) dentatus group, Beudanticeras albense, Lyelliceras pseudolyelli 

 (Parona & Bonarelli), L. aff . gevreyi. Bed 2 (i) Beudanticeras santaecrucis, Brancoceras 

 sp., and on a bedding plane 1 foot (0-3 m.) from the base, Desmoceras latidorsatum is 

 not uncommon and this horizon has also yielded a single example of Hypophylloceras. 

 Bed 2 (ii) Brancoceras sp., Pseudhelicoceras argonnense. Bed 2 (iii) Lyelliceras lyelli, 

 Brancoceras sp., Eubrancoceras aegoceratoides (Steinmann), ' Oxytropidoceras ' evansi. 

 Bed 2 (iv) Desmoceras latidorsatum, Beudanticeras laevigatum, B. sanctaecrucis , B. 

 albense, Hoplites (H.) sp. dentatus group, Lyelliceras gevreyi, Brancoceras spp., 

 Protanisoceras (P.) alternotuberculatum, P. (P.) barrense P. (P.) nodoneum. Bed 2 (v) 

 Beudanticeras laevigatum, Hoplites (H.) baylei, H. (H.) sp. dentatus group, P. (P.) 

 alternotuberculatum, Pseudhelicoceras argonnense. Bed 3 Douvilleiceras clementinum, 

 Hoplites (H.) dentatus, H. (H.) baylei, H. (H.) spp. Bed 4 basal 1 metre is character- 

 ised by Hoplites (H.) spp. but P. & J.-P. Destombes record Douvilleiceras up to this 

 height, and it is here included in the lyelli Subzone. 



In comparison with the Horton Clay pit, Small Dole, the fauna listed above shows 

 the following important features. Bed 1 must be close to the underlying eodentatus 

 Subzone for Lyelliceras pseudolyelli is directly transitional from Lyelliceras camatteanum 



