AND LEICESTEESHIRE AND THEIR RELATIONS TO GEOLOGICAL STRUCTURE. 11 7 
disturbances, given such a high susceptibility for the rocks as exists in the examples 
mentioned. 
Further, in the case of the Rempstone Fault, which has a downthrow to the north, 
“ the distribution and magnitude of the disturbing forces does not agree with the 
hypothesis of a normal sill faulted down to the north. On the other hand, the 
distribution is such that it might well be given by a fault-intrusion along a fault 
hading to the north” (p. 111).—G. W. W. 
N.E. 
s.w; 
Fig. 7. Section to illustrate distribution of lines of force arising from an intrusion along a fault with 
a hade to the north as at Rempstone. L and R denote the positions of the observation stations 
at Loughborough and Rempstone. 
(c) As regards the remaining possibility, that movement has been repeated along 
the faults at more than one period, there is strong evidence that this is actually the 
case. At Cinderhill, near Nottingham, there are faults, exposed both at the surface 
and in underground workings, which show clearly that movement has taken place 
along the same line at two different periods.* The principal movement was pre- 
Cambrian and the later movement post-Triassic in age, the displacement of the beds 
being much greater in the Carboniferous beds below than in the Permian beds above. 
Now the Cinderhill Faults follow an east-west course parallel with, and only four 
miles north of, the Bramcote Faults, with which the “Nottingham” magnetic 
disturbance is to be correlated (p. 112). Further, it will be shown below (p. 122) 
that the whole of the structures among the Mesozoic rocks appear to be superimposed 
on structures developed in earlier times in the underlying Palaeozoic rocks. Thus, if 
the dolerites are fault-intrusions, there is still the possibility that they may be 
* Dr. Walcott Gibson, “ The Concealed Coalfield of Yorkshire and Nottingham,” ‘ Mem. Geol. 
Survey,’ 1913, p. 39. 
