23i 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 25, 



General Section of the Paris Basin with reference to the conditions most resembling 

 the Hampshire Basin. 



o 



Arrangement according to 



M. d'ARCHIAC*. 



&th Group. 

 Calcaire lacus- 

 trine sup^- 

 rieur. 



hth Gi'oup. 



Gr^s et sables 



sup^rieurs. 



Subdivisions. 



F. limestones 

 (Calc. a Helix) 



Clays and mill- 



Divisions ofCv- 

 vier, C. Pre- 



VOST, C. d'OE- 

 BIGNY, etc. 



1^5 



4th Group. 



Calcaire sili- 



ceux, ou 



Calc. lacustre 



moyen. 



Srd Group. 



Gr^s et sables 



moyens. 



2nd Group. 

 Syst^me cal- 

 caire. 



\st Group. 



Sables et gr^s 



inf^rieurs. 



3. Sandstones. 

 2. Sands. 



1. Marls. 



5. Millstones and 

 clays. 



4. "I Freshwater 

 V marls and 

 3. J limestones, 



2. Gypseous series, 



1. Freshwater marls 

 and limestones. 



3. Limestones. 

 2. Sandstones. 

 1. Sands. 



4. Marls. 



3. Upper Calc. gros 



2. Calc. grossier. — 



1 . Glauconie gros- 

 si^re. 



'6. Sands and clays. 



5. Shelly beds 



(Lits coquilliers). 



4. Sands. 



3. Conglomerates & 

 sands (Gr^s et 

 poudingues). 



2. Clays, lignite, etc. 

 F. limestone. 



r Sands (Glauco- 

 . J nie inferieure) 

 . ' ] and calc. piso- 



L litique. 



CHALK , 



♦ Bulletin de la See. Geol. de France, vol. x. p. l/S 



