118 Geological Remarks on the 



is sometimes displaced, leaving the blocks of stone 

 lying in confusion : sometimes these free-stones arc 

 coloured or rendered calcareous or argillaceous by in- 

 filtration from the covering strata, p. 30 and 36. 

 iFontenay-auoc- Roses y b\ miles hSW. : here M. Lopez silnk 

 a deep well in his garden, through the gypsum and 

 coarse limestone formations, p. 50. 



Ganelon Mountain, near Compiegne, NE., has (alluvial) 

 puddingstone on it^ of coarse quartz grains and shells, 

 &c. p. 47. 



>Gentilly, 3 miles S., has pits of coloured potters' clay, 

 which stratum extends in a range to Meudon : it has 

 also quarries of coarse limestone that produce in their 

 lower beds periwinkles, solens, (omitted in the transla- 

 tion) oysters, muscles, pinnae, calyptrae, pyrulse, large 

 tellines, terebellse, porpytes, madrepores, nummulites, 

 and fungites ; above which are strata of greeiv earth 

 with some vegetable impressions, then gray or yel'- 

 lowish strata containing venuses, camprcys, and nunie- 

 rons tuberculated cerites : beds of good building-s^tone ; 



, above these is a stratum containing an entire bed of 

 small long and striated tellines : the fossils are the 

 same in these quarries as at Grignon and Meudon^ and 

 on the top of Montwartre, p. 44, 47, 48 and 5b. 



Oisors, 35 miles NW., is at the extreme NW. corner of the 

 bason of Paris described, and adjoining the chalk di- 

 stricts. Mount Oz/i«, with a puddingstone of quartz and 

 shells in it, is near this place, p. 39 and 48. 



Grignon , has quarries of coarse limestone, whose 



lower beds contain periwinkles, and the twelve other 

 kinds of shells and fossils mentioned at GentiUy, with 

 the addition of cerites (as mentioned p. 54) ; also the 

 fossils agree with those of the quarries at Matdon and 

 . on the top of Montmarire. pages 47, 54 and 55. 



Grisy is situated at one extremity of the gypsous district 

 and Meaux at another ; it has only the first mass of 

 gypsum in its quarries, p. 49 and 53. 



Guespelle , the strata of this place answer" to 



those of Gentilly, above, p. 47. 



fiigk Normandy province, to the north-west of Paris, is 

 wholly composed of chalk (forming the N W. border 

 of the basin of Paris), p. 39. 



Houdan, 28 miles W., has pits of gray potters* or plastic 

 clay. p. 44. 



Jssyy 4 miles SW. by W.^ has quarries of coarse lime- 

 stone. 



