54 



THE GEOLOGIST. 



floating ice, loaded with detritus from the coasts of Cumber- 

 land and Ireland, and he thinks that by referring the glacial 

 and diluvial phenomena of North Wales, as Murchison and 

 Lyall have referred those of northern Europe and North 

 America, and Maclaren those of Scotland, to the combined 

 action of glaciers moving on dry land and marine currents 

 and icebergs drifted chiefly from the north, and depositing 

 their loads of pebbles in more southern latitudes, we may as- 

 sign to each of these great causes its proper function, with- 

 out assuming the exclusive agency of either of them. Dr. 

 Buckland concluded with noticing a recent discovery of 

 Mr. Sopwith of striated and polished surfaces of carboni- 

 ferous limestone covered by drift, and of parallel striee on 

 a limestone boulder in this drift, at Langley near Haydon 

 Bridge. 



2. — A paper was also read: '''on the Bristol Bone bed'' 

 [in the lower lias near Tewkesbury), By Mr. Strickland, 



After some prehminary remarks on the existence of this 

 stratum (consisting chiefly of remains of fishes and saurians) 

 at various places between Westbury Clifi' on the Severn, and 

 Watchett in Somersetshire, as also its occurrence at GoldclifF 

 and St. Hilary in Glamorganshire and near Axmouth in De- 

 vonshire, Mr. Strickland proceeds to point out its presence 

 between Tewkesbury and Gloucester, at many miles further 

 north than any yet described. The first locality is Coomb 

 Hill, four miles S. of Tewkesbury, where a considerable 

 portion of the bone bed was exposed in 1841, and its 

 contents preserved by Mr. Dudfield of that place. The 

 bone bed which was laid open consisted of the following 

 beds. 



feet inches 



Alternations of lias, limestone and clay . . 30 0 



Ditto sandstone and black laminated clay . 2 8 



Bone bed , . . . . 0 1 



Black laminated clay . . . , 3 6 



