82 Quartzose Conglomerate at Caldon Low, Staffordshire. 



Brinter beds, and in the other the limestone from the roof of 

 Caldon Low limestone. 



The lithological examination of the materials of the Caldon Low 

 conglomerate and the sand- and clay-pits of the Weaver Hills and 

 Derbyshire has shown that they are all essentially the same. The 

 deposits in each case were probably laid down by river action, 

 the consolidated nature of the Caldon Low material being due to the 

 fact that the hollow in this case was a subterranean one, dissolved out 

 of the Uniestone, which would provide the calcium carbonate which 

 forms the cement. So far as the origin of the pebbles is concerned, 

 these include many types of Carboniferous rocks, and, as a whole, 

 are a typical Bunter assemblage ; hence it seems feasible to infer 

 that they are derived from deposits of the latter age. 



Condusions. — The quartzose conglomerate at Caldon Low is not 

 a penecontemporaneous bed deposited unconformably on the 

 Caldon Low limestone, but is an infilling of a subterranean hollow 

 and several underground watercourses in the limestone. 



The pebbles are derived mainly from Bunter deposits, and have 

 reached their present location at some period between Bunter and 

 Glacial times. 



The fossils in the conglomerate are all derived and mainly of 

 Do age. 



