92 



MIDDLE ALBIAN STRATIGRAPHY 



Ll t h o I o g y 



Weathered grey silty clay somewhat marly near the base 



Blackish phosphatic nodules .n weathered grey silty clay. 



Dark grey slightly silty clay with crushed shells and part pyntiscd 

 fossils. Brownish phosphatic nodules are scattered throughout At 8 

 feet from the base there is a seam of 'solid' pyritic ammonites. 

 Approximately 2 inches above the base there is a similar bedding 

 plane with well preserved fossils. 



Marly silty light grey clay with large concretions of silty shelly marl stone. 



(v) Darkish fawn- grey silty clay, shell y with scattered 'solid 1 pyri t ic 

 fossils 



(iv) Mottled fawn-grey clay, silty with more numerous 'solid' pyritic ammonites, 



(III) Darkish fawn-grey shelly silty clay with scattered pyritic fossils. A 



distinct line of brown cavernous phosphatic nodules occurs 4 inches above 

 the base, below which the clays become much siltler. 



(il) Mottled fawn-grey shelly clay sil t y with 'solldMossIl s. 



0) Darkish silty fawn-grey shelly clay with a bedding plane of scattered 

 pyritic fossils at the middle. 



Dark grey silty clay with scattered line of phosphatic nodules 9 inches fron 

 the top. 



Ft ins M. 



5^l" '." "_ <& 



Fig. 40. Gault section at the No. 3 claypit of the Tuileries de St. Parres les Vaudes at 

 Courcelles pres Clerey on E. side of the river Seine, and to the E. of the D 49 road 2 - 5 km 

 SE. of Clerey, Aube. 



