IN THE PARIS BASIN. 



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Calcaire Grossier are here exceedingly fossiliferous ; a band of 

 Tereheiliun is especially striking. 



Note. — The Railway cutting near Villiers, on the way from 

 Grignon to Neauphle, passes through a very fossiliferous portion 

 of the Upper Calcaire Grossier. 



MoNTAiNViLLE. — About five miles nearly due north of 

 Neauphle-le-Chateau, the Pisolitic Limestone is exposed, with its 

 characteristic fossils, mostly, however, in the form of casts. On 

 the road to Montainville, Beynes is passed, which is interesting 

 for its fossiliferous Chalk, here in a magnesian condition. 



HouDAN is a very rich locality for fossils of the Calcaire 

 Grossier. 



GISORS CENTRE.— (Thirty-nine miles N.W. of Paris.) 



Leaving Grignon, it is best to return to Paris ; and if the latter 

 is to be re-visited, some trouble is saved by leaving the collected 

 fossils in the depot for a few days. Take train from St. Lazare 

 to Gisors, an excellent point from which to study some sections 

 very rich in fossils. There is an inn opposite the station. 



Chambors. — Several large quarries in the Upper Calcaire 

 Grossier. 



Chaumont. — Large road-side section, very fossiliferous, in the 

 Calcaire Grossier. 



Le \'ivray. — Large cutting at the side of the railway, yielding 

 very fine fossils, Tiirritella terebellaia, Venericardia planicosia, <S:c. 



Liancourt. — Sand-pit near the road in Lower Calcaire 

 Grossier, showing the conglomerate bed and junction with the 

 Sables de Cuise in the lowest part, which is fossiliferous. 



N'ote. — Practically the whole of the road from Chaumont to 

 Liancourt presents a series of sections of the Calcaire Grossier, 

 and all can be easily studied in one day. 



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