426 SILURIAN STRATA REVERSED BY TRAPPEAN ERUPTIONS. 



There are, therefore, indications of several periods of movement, one of the last of which 

 was probably that, which trending from N. to S., and from N. and by W., to S. and by 

 E., was caused by a great eruption of the Malverns, accompanied by other lateral and 

 parallel movements. The N.E. and S.W. strike, so dominant between Ledbury and 

 the principal mass of syenite, was the original direction of the deposits, while their 

 fractured condition was probably the result of the north and south, or last movement 

 to which they were exposed. Similar effects of dislocation, proceeding from the inter- 

 section of conflicting lines of strike and on a much larger scale, have been pointed 

 out in Pembrokeshire. 



