IN THE ANGLO-PARIS BASIN 



95 



quoted subsequently by Lemoine (1910). Houdard (1933) confirmed Lambert's 

 observations and presented accurate and important new information. More recently 

 P. & J. -P. Destombes (1965 ; 264-265) have reinterpreted the sequence indicating a 

 facies change certainly within the spathi Subzone between St. Florentin and Montlehu 

 a distance of barely 1 km. In this area the clay facies of the Perthois (the strip of 

 country flanking the Chalk and including portions of the Departements of the Haute 

 Marne, Aube, and Yonne) gives place to the predominantly sandy facies of the 

 Puisaye (the similar strip of country stretching from the River Armance to the Loire) . 

 No sediments of eodentatus Subzone age have been proved in this area. Although 

 known to occur, lyelli Subzone sediments are no longer exposed, but from sections 

 which existed formerly at St. Florentin, and to the SW. near Mont St. Sulpice, 

 Seignalay and Beaumont, it is readily apparent from the old collections that the 

 equivalent of Bed 3 at Courcelles is present. The fauna is the same but it is pre- 

 served in a much grittier and pebbly matrix. Two sections in sediments of spathi 

 Subzone age exist in this area today. 



Montlehu 



The Tuilerie Montlehu is situated immediately S. of the N77 at the village of that 

 name. It exposes about 18 feet (5-48 m.) of weathered grey clays with crushed 

 Hoplites (H.) spp., and Inoceramus concentricus , and is classified without doubt with 

 the spathi Subzone. 



As one proceeds SW. the topography changes quickly, and St. Florentin is built 

 upon the high ground formed by the essentially sandy deposits of both Middle and 

 lower-Upper Albian age. 



Sabliere Binot 



This disused sandpit in the Sables de Frecambault at the SE. end of the town of 

 St. Florentin is situated on the same quarried escarpment as that described by 

 Houdard (1933 ; 47) . The pit, which is now being filled in, shows sediments of Middle 

 & Upper Albian age (text-fig. 42). It has been mentioned by P. & J. -P. Destombes 

 (1965 ; 264), and Marie (1965 ; table opp. p. 286) who includes additional information 

 on the other sections in the area. 



Bed 1 has not yielded fossils but it lies above the equivalent of Bed 3 at Courcelles 

 (lyelli Subzone), known to be present in this area. It is almost certainly of spathi 

 Subzone age and is considered to be the equivalent of the clays exposed at Montlehu. 

 Bed 2 shows the incoming of clay sediment and it seems to the writer that this part 

 of the sequence is more likely to have been deposited at the same time as the clays at 

 Montlehu. However, the only fossils found are phosphatised bivalves. Dr. P. 

 Destombes has informed me that large Hoplites (H.) were obtained from Bed 3 during 

 the quarrying operation. 



Bed 4, the Bed VII Graviers a Opis glareosa of Lambert, is of considerable interest. 

 It can be divided into two very irregular subdivisions. A lower dark grey sub- 

 division with Hoplites (H.) spp., derived from the spathi Subzone, and an upper 



