Coast-cliff Denudations. 489 



ends strata in a cliff-like form. They were hardened 

 and raised into land. The weather and the waves 

 attacked them, wore them back, and cliffs are the result. 

 I re-mention these matters to show that such denu- 

 dations on a great scale are going on now, and there- 

 fore, when I speak of former unions and separations of 

 our island with and from the mainland by denudation 

 and oscillation of level, the statement is founded on 

 excellent data. 



