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SAASTINGS 
———— THICK DRIFT & CRAG 
EOCENE 
Map of the earthquake of April 22, 1884. N.B.— The places marked are those at which the shock was felt. In the east of England 
only the more important of such places are marked. 
BRISTOL 
Section from Bristol to Harwich, showing the probable range of the paleozoic rocks. 
2. Permian to upper greensand; 3. Chalk. 
paleozoic rocks is known at Harwich and London. 
There is some uncertainty as to their position under 
Reading and Colchester ; but for the purpose intended, 
and regard being had to the depth at which the shock 
1. Paleozoic rocks (carboniferous and older) ; 
must have originated (certainly far within the paleo- 
zoic rocks), the line drawn is sufficiently near the 
truth. We can see how the shock can have been 
propagated through the hard paleozoic rocks, and 
