|
The lower junction has been described as conformable; at other places an unconformity has been invoked while elsewhere a normal fault, a thrust, or a lag fault have been postulated.
Unfortunately exposures of the actual junction between the Borrowdale Volcanic Group and the Skiddaw Slates are for long distances poor and obscured by drift deposits, or disturbed by the passage of ice. There is often ample excuse for controversy regarding the structural relationships. Furthermore it is clear that the incidence of cleavage varies greatly from place to place and from bed to bed.
Nevertheless during the last few years much new mapping has been done and it is good to attempt to correlate present knowledge. This Dr. Moseley has done, including in his account the Caledonian, end-Silurian, Variscan and Alpine movements and so providing information for discussion of the tectonics of the north-west of England as a whole. The road to the solution of these problems lies in detailed field surveys covering the whole district. Meanwhile Dr. Moseley's present
...
This 250-word extract was created in the absence of an abstract.
