IN THE ANGLO-PARIS BASIN 101 



However, no detailed information on the sedimentary sequence in this Subzone in 

 the northern area of the Bray has as yet been recorded. 



(iv) COMPARISON BETWEEN THE PAYS DE CAUX AND 

 THE ISLE OF WIGHT 



The expansion of the sequence towards the NW. end of the Pays de Bray apparently 

 increases further to the NW., for the deep boring at Puys, near Dieppe, showed a very 

 considerable thickness of clay (Jukes-Browne 1900 ; 398). However, an unknown 

 thickness of this clay must be of Upper Albian age, representing a facies change from 

 the Upper Greensand sequence seen in the Pays de Bray. Jukes-Browne is probably 

 wrong (1900 ; 398) in classifying only the lowest 67 feet (2 m.) of sandy black clay of 

 the core with the Lower Gault, but in the absence of palaeontological evidence, the 

 boring cannot be interpreted. In the Pays de Caux a somewhat different facies is 

 seen reflecting the proximity of a marginal area of Middle Albian deposition. 



The Albian sediments of the Pays de Caux (Seine Maritime) are well exposed in the 

 cliffs between St. Jouin and Le Havre. The Upper Albian Gaize rises from sea-level 

 at the base of the Chalk cliffs to the N. of St. Jouin followed quickly by the Gault, 

 and the top of the underlying Poudingue ferrugineux. Below these pebbly beds are 

 sands of Upper Aptian age. In the area between Octeville and St. Adresse these 

 sands are seen to rest upon Kimeridgian sediments, and in this area the whole 

 sequence of Lower Cretaceous sediments can be seen sandwiched between the Chalk 

 and the Kimmeridge Clay. However, along the entire coast from St. Jouin to Cap 

 de la Heve a large number of rock falls tend to obscure the lower part of the Albian 

 sequence in particular, nonetheless, it is possible to make out the succession at many 

 points. 



Lennier (1867) first described the succession and provided the foundation upon 

 which subsequent stratigraphic work has been based. His is still the only published 

 section of the sequence at Cauville (1867 ; plate 4). The early history of research was 

 summarised by Jukes-Browne & Hill (1896) who made the first major attempt to 

 correlate Upper Albian and Cenomanian sediments in the Pays de Caux with those of 

 southern England. Hill also provided some information on earlier Albian sediments 

 and gave the first detailed accounts of the Albian sequence seen between Octeville 

 and Ste. Adresse. Jukes-Browne (1900 ; 395-401) reviewed the Albian sediments in 

 this area, presenting a useful picture but without any real detail. Subsequent 

 stratigraphic work has tended to concentrate on the sequence at Cap de la Heve, as 

 for example the recent important studies by P. Destombes (1958), Cayeux (i960), 

 and Rioult (1962). Destombes (1958 ; 306-308) sets out to describe the Albian 

 sediments between Le Havre and St. Jouin but, and this is important, he bases his 

 account of the stratigraphy on the sequence seen at Cap de la Heve and Octeville. 

 His classification of these sediments gives a good picture of the zonal sequence in this 

 area. Cayeux (i960 ; 21-25) quotes large extracts from Destombes' paper, but adds 

 to this important new information pointing out that the sequence in the Poudingue 

 at Cauville shows marked lithological variation to those seen elsewhere. The 

 account by Rioult (1962 ; 39-42) of the section at Cap de la Heve is very useful and he 



