CLIFFS, SHOWING STEATA. 



any other agency; these strata contain so many marine 

 shells and other matters peculiar to the sea, that the fact 

 does not admit of doubt that they were there produced. 

 These same strata are met with throughout the land ; in 

 sinking wells and mines, the same strata are cut through, 

 and have a known and uniform succession, with but few 

 exceptions; the cliffs, however, are the most convenient 

 places to see these strata. That the same process of alteration 

 in the position of the water and land is still going forward, 

 is shown by many evidences, such as towns which were once 

 on the sea-shore, being now some distance from it, as the 

 City of Norwich, and in other cases the reverse. The chalk 

 cliffs at Dover, Eamsgate, &c., show the action of the sea in 

 the corroded state they present, and slips or falls of great 

 masses which have been undermined by the sea, are 

 frequently occurring. 



The ancient town of Ravenspurn, at which Henry IV. 

 landed, has entirely disappeared, and others, recorded to have 



