DRUID SANDSTONE. 255 



It appears to be more nearly related to the " Calcah'e siliceux" of 

 M. M. Cuvier, and Brongniart, than to any other of the tertiary forma- 

 tions of France*; but that deposit is stated to lie above the plastic clay f: 

 future observations can alone reconcile this discrepancy of opinion. 



sidered it as a member of that series of irregular alternations of beds of clay, sand, and gravel. 

 Geological Tratisactions, Vol. iv. p. 301. 



* My friend, Chas. Lyell, Jun. Esq. of Bartley Lodge, Hampshire, upon seeing the 

 boulders of druid sandstone in the vicinity of Lewes, was immediately struck with their re- 

 semblance to those of the Calcaire siliceux in the forest of Fontainbleau. 



t Calcaire siliceux.—" La formation dont nous allons parler, est dans line situation 

 geologique parallele, pour ainsi dire, a celle du culcaire marin. Elle n'est situee ni au-dessous 

 d'elle, ni au dessus, mais a cote, at semble en tenir la place dans I'immense etendue de terrain 

 qu'elle recouvre a Test et au sud-est de Paris. Ce terrain est place immediatement au-dessus 

 des argiles plastiqices." Geograpk. Min. p. 29. 



