GEOLOGICAL SOCIETY OF LONDON. 



55 



feet inches 



Green marl ..... 25 0 



Red marl ..... 3 — 



The bone bed rarely exceeds an inch in thickness, and is often less. 



Mr. Strickland is of opinion that the organic reliquiae were washed into a 



previously rippled bed of clay, on account of their being broken and 



worn in many cases. 



The next locality is Wainlode Cliff, on the banks of the 



Severn— -the order of the beds is as follows : 



feet inches 



Bone bed ..... 0 1 



Light green marl . . . . 23 0 



Red marl . . . . . . 42 0 



The bone bed is far less rich in organic remains, and in this as 

 well as the former only one bivalve has been found, very imperfect. 



The third locality is near Bushley, 2| miles West of Tew- 

 kesbury ; the black laminated clay of the two other points is 

 there exposed, and includes a bed of white micaceous sand- 

 stone, containing impressions of the same bivalve as that 

 above referred to. The lowest part of the laminated clay, 

 rests upon a 20 feet deposit of greenish marl, succeeded by 

 red marl. That this bed of sandstone occupies the position 

 of the bone bed, is proved, Mr. Strickland observes, by the 

 Wainlode section, where the organic remains are for the 

 most part wanting, and replaced by white micaceous 

 sandstone. The stratum at Dunhampstead near Droit- 

 wich, consisting of a white micaceous sandstone con- 

 taining the same bivalve, is also considered to occupy 

 the same position. It appears that, as the bone bed at 

 Axmouth, Watchett, Aust and Westbury, and other sou- 

 thern localities, occupies the same position as the sandstone 

 of Worcestershire, that we have a remarkable instance of a 

 thin stratum ranging in one direction about 112 miles, from 

 Dunhampstead to Axmouth. Mr. Strickland concludes by 

 stating his opinion that this bone bed belongs to the lias 

 and not the triassic series. 



