IN THE ANGLO-PARIS BASIN 



89 



that the eodentatus Subzone might also be present. The section between Pargny-sur- 

 Saulx and Maurupt described below provides new information on the basal part of 

 the Middle Albian in this area. 



The extensive clay pit belonging to the brick and tile works of the Hugenot Freres, 

 situated a few hundred yards E. of the D61, 1 kmNNW. of Maurupt, has been deepened 

 and shows the lithological sequence given in text-fig. 38. Bed 1 did not yield 

 ammonites to the writer but bivalves are common. It is possible, although by no 

 means certain, that it is of uppermost mammillatum Zone age. Bed 2 has yielded 

 phosphatised or pyritised Hopiites (Isohoplites) eodentatus, H. (I.) sp., Beudanticeras 

 albense, B. sanctaecrucis, Otohopiites sp., Lyelliceras camatteanum (d'Orbigny), 

 Brancoceras sp., indicating the eodentatus Subzone, and its top is an erosion surface. 

 The sediments of Bed 3 contain crushed fossils including ammonites, some quite large, 

 such as Hopiites (H.) spp., Lyelliceras of lyelli Subzone appearance, and Douvilleiceras 

 sp., and can be classified with the basal part of the lyelli Subzone. 



Bed 



Li thology 



Ft Ins M 



Fawn-gray slightly silty clay, shelly, with i ron-staine d 

 partings. Some fossils are partly phosphatised. 



(II) Black phosphatic nodules scattered in fawn grey silty clay. 



(i ) Fawn-grey shelly clay, silty with iron stained partings. 

 Part-phosphatised and part-pyritic ammonites occur 

 scattered throughout. 



V 



Silty fawn-grey shelly clay with some pyritic fossils 



3 6 



4 5 



Fig. 38. Section in basal Gault exposed in the claypit of the Hugenot Freres, situated a 

 few hundred yards E. of the D 61 road, 1 km NNW. of Maurupt, and 1-4 km S. of Pargny- 

 sur-Saulx, Marne. 



(c) Les C6tes Noires (Haute Marne) 



Approximately 15 kms SSE. of the section described above is the natural river cliff 

 of Les Cotes Noires situated on the W. bank of the River Marne 1 km to the W. of 

 Moeslain, near St. Dizier. This magnificent natural section can only be safely 

 worked in reasonably dry weather and is approached by way of the summit of the 



