EARTH-MOVEMENTS DURING CARBONIFEROUS TIMES. 379 
It will be noticed that no attempt has been made to apply 
the same method of investigation to the eastern boundary. The 
recently-expressed views* of Professor Kendall seem the only 
possible ones in the present state of knowledge. 
It is possible, if not probable, that similar conclusions would 
be arrived at by applying the same methods to some of the other 
British coal basins, and t^hat of South Wales, from the larger 
amount of available data, owing to its margins being more ex- 
posed, would seem from a cursory examination to be a particu- 
larly promising area. In any case it would appear that to 
attribute the present limits of the British coal basins to the post- 
Carboniferous upheaval of their margins alone, does not explain 
all the known facts. 
* Final Report of the Royal Commission on Coal Supplies, Part IX., 
p. 31. 
