ioo MIDDLE ALBIAN STRATIGRAPHY 



however, contains large crushed Hoplites (H.) including H. (H.) cf . dentatus and H. (H. 

 cf. maritimus sp. nov. indicating the lower part of the spathi Subzone. How much 

 of this sequence overlaps that of section i, if at all, cannot be determined. Un- 

 fortunately, during 1967 this section was rapidly expanded, and the higher part of 

 the sequence seen in a rise has now been quarried away. 



Bed 



Lithology 



Weathersd grey sllty clay with large partly phosphat ised 

 ammonites. Shells are replaced by pyrite. 



Dark grey somewhat sllty glauconitic clay with occasional 

 phosphatic nodules. 



Fawnish grey clay burrowed by dark grey clay with a few 

 crushed fossils with pyrite replaced shells. 



(III) Sandy glauconitic green grey clay with sandy pockets 

 particularly In the lower part. 



(II) Hard ferruginous pan with white buff phosphatic nodules. 



(I ) Tough grey brown gritty loam. 





. ipuzos. 



Ft 



1 . ■ 1 1 rw 



Ins M 



4- 



3- 



2- 



1- 



1 



2 0- 1 



Fig. 44. Section in Gault in a claypit 08 km N. of the village of Villers St. Barthelemy, 

 c. 150 yds E. of the D2 road, Pays de Bray. 



(b) Forges -Les-Eaux, & St. Martin 



Further north in the Pays de Bray, the eodentatus and lyelli Subzones sediments 

 expand considerably and consist of shelly clays. The section in the Briqueterie 

 Ledoict near St. Martin l'Hortien situated at the NW. end of the Pays de Bray has 

 been described by P. Destombes, who introduced the writer to it. It shows a good 

 development of clays of eodentatus Subzone age overlying high mammillatum zone 

 clays (see P. Destombes 1970 & in Pomerol & Feugueur 1968 ; 129-130, where the 

 locality is given as Bully). 



The lyelli Subzone is known from a section west of Forges-Les-Eaux where Fortin 

 collected phosphatic and pyritic Lyelliceras with the shell, now in the Museum 

 d'Histoire Naturelle, Rouen, which were recorded by P. Destombes (1958 ; 309). 



