1 8 

 3 Jl 

 1 



188 OCCURRENCE OF 



Ft. In. 



1. Fresh-water limestone ; colour, clialk white... "j Superior to the 



2. Green Marl ]■ Calcaire gros- 



3. Light yellow and brown clay J sier.^ 



4. Fine yellow sand, without organic remains 6 10 



passing into — 



5. Coarse quartzose sand, sometimes mixed with ferruginous clay, 



containing remains of Mammalia, reptiles, Jishes, and shells... 4 7 



6. Soft Lignite, brown and black 1 4 



7. Grey sand, with clay and veins of earthy, friable carbonate of 



lime, passing downwards to a ferruginous, and lastly to a 



light grey ?and ...• 6 3 



8. Brown and ferruginous plastic clay 1 10 



9. Light grey sand, passing downwards to a very ferruginous 



sand 4 7 



10. Dark grey plastic clay, intermixed with ferruginous sand I 



11. Very soft and impure lignite „ 4 



12. Brown and ferruginous plastic clay „ 8 



13. Dirty yellow argillaceous sand, full of shells, almost all of the 



genus Melania 1 4 



14. Thinly laminated grey and brown plastic clay, with well-pre- 



served specimens of Melania, Cyrena, Melanopsis, Neritina, 

 and traces of vegetables. It contains, in the lower part, a 

 thin bed of pyritical sandstone 1 4 



15. This bed consists almost entirely of broken shells (principally 



Melania), mixed with a little whitish sand 2 2 



16. Fine whitish sand, with small patches oi Melania, Cyrena, Me- 



lanopsis, &c. ; (the Planorbis hemistoma. Sow., is found also 



inthisbed) 3 7 



17. Yellow argillaceous sand, with many well preserved Cyrence... 1 8 



18. Dark grey plastic clay 1 



19. The same with shells, principally Melanice and small Ostrece. 1 



20. Irregular lignite „ 4 



21. Very friable yellow marl, with traces of leaves and shells, and 



numerous seeds of the C7mra 1 2 



22. Lignite „ 4 



23. Dark grey plastic clay, with some shells 6 



24. Irregular lignite „ 4 



25. Similar to 21 I 2 



26. Lignite „ 4 



27. Similar to 23 2 4 



28. Tough clay continuing apparently to the chalk, which appears 



about 10 or 15 feet below 27; the contact between the two 

 is not, however, exposed. 



These strata present rapid variations in thickness and lithological 

 structure. In almost all the beds of lignite and clay, selenite, carbo- 

 nate of lime, Websterite, oxide and sulphuret of iron, frequently 

 occur. The clays are all more or less carbonaceous. 



The foregoing section exhibits the usual numerous alterna- 

 tions of the thin and very irregular strata, characteristic of 



' The Calcaire grossier, which is well developed, and abounds in fossils 

 at a distance of about five miles westward of Epeniay, is here entirely 

 wanting. There are some fine sections of it at Damery, Arty, Finery, 

 Boursault, and neighbourhood. 



