DOLOMITIO CONGLOMEHATE OF B]?1ST0L. 



215 



older formatioiiH on whieh thoy rest. Tlie nncoiiformability 

 of the I'ormian upon the Carboniferous, althoiigh well 

 marked, cannot be said to be violent ; for, as a rule, the 

 Permian strata have tlie same, or approximately the same, 

 dip as the Carboniferous when the two formations occur 

 together. But the Triassic strata bear no sucli relation to 

 the formation immediately preceding thorn. All the pahwo- 

 Koic strata had been upheaved, dislocated, metamorphosed, 

 and extensively denuded before the Triassic deposits began 

 to be laid down. These latter circle round the outskirts of 

 the present high grounds of Wales arid the North, and South- 

 west of England, and overlap the (Carboniferous strata in 

 such a way as to lead to the inference that the configuration 

 of Wales, and Northern, Central, and South-west England in 

 Triassic times had oven then assumed much of its present 

 appearance. 



