Upper Formations of the New Red Sandstone Sj/sfem. 347 



stone of Ombersley, Bromsgrove and Warwick ; and like those we have here 

 described, they pass into, and are inseparable from, the great mass of the 

 New Red Sandstone of England, which, from geological and zoological proofs, 

 we consider to be the equivalent of the Bunter Sandstein. 



Tn thus identifying the red and green marls, and an included band of sand- 

 stone with the Keuper, and separating this marnose formation from the un- 

 derlying sandstones, we have the direct authority and example of the best 

 French geologists ; for M. Elie de Beaumont, in a memoir on the Vosges, has 

 shown that the formation of Marnes Irisees, which he places on a parallel with 

 our English red marl, is the true representative of the Keuper; and in the 

 south-western parts of France, M. Dufrenoy has shown us, that these marls 

 and the underlying sandstones, are brought together precisely in the same 

 manner as in England, the Muschelkalk, or subdividing limestone, having 

 thinned out*. 



In a subsequent memoir, we may offer some explanation of the lines of dis- 

 location, by which these deposits have been affected. 



POSTSCRIPT. 



Dr. Buckland has described in the Geol. Proc. v. ii. p. 439, the silicified 

 stems of trees, which occur at Allesley near Coventry, but has not deter- 

 mined the age of the rock in which they are imbedded. Having visited that 

 spot, we have no doubt that these trees occur in that part of the series, which 

 we have shown to be the equivalent of the Bunter Sandstein. The red sand- 

 stone of Kenilworth may be traced without interruption from that place to 

 Coventry and Allesley, where it is interstratified with beds of quartzose and 

 trappean conglomerate, which are identical with those of North Worcester- 

 shire, Staffordshire, &c. (See Mr. Murchison on The Silurian System, p. 42.) 

 The fossil trees of Allesley are found in a stratum of this conglomerate, con- 

 taining manganese, and lying between strata of ordinary red sandstone. 



The same red sandstone occurs in thick beds at a quarry, lately opened, 

 about three quarters of a mile N.W. of Coventry. It differs in no respect 



which it rests ; thus perfectly resembling the section at Bromsgrove. The Hawkstone Hills are 

 chiefly composed of the same light-coloured variety of the Red Sandstone. It is indeed remark- 

 able that a mere lithological distinction of colour should be so very persistent. 



* See Dufrenoy and Elie de Beaumont Memoires pour servir a une description geologique de la 

 France, vol. i. p. 313, et seq. 



VOL. V. SECOND SERIES. 2 Z 



