24 CORNISH POST-TERTIARY GEOLOGY. 



solidated sand beds attain their maximum development near Godrevy 

 Island, the section consists of : 



Brown loam, mth angular stones Sft. Oin. 



Coarse grej' and buff consolidated sand, with angular grains, in 



beds apparently dipping inland. (Probably old blown sand.) 10ft. Oin. 

 Coarse grey sand, with pebbles scattered through it, and traversed 



by a line of pebbles 6ft. Oin. 



Coarse sand of qua»tz grains and comminuted shells, full of quartz 



and slate pebbles and subangular fragments, and containing a 



few pieces of flint ; a fragment of a Miirex was also obtained... 3ft. to 4ft. 



Tlie base of the deposit is about 4 feet above high-water mark. 



Eock platforms abound on this coast, their surfaces being planed 

 at about the level of spring-tide high-water. 



(Fig. 16.) Near the point where the foregoing section was 

 obtained, a reef of rocks is noticeable at 70 j-ards from the cliffs, 

 and is capped by a pinnacle of Head, consisting of light-brown loam 

 with angular slate fragments. Just below the Head traces of 

 reddish and black consolidated sand fill up inequalities in the reef, 

 at about 10 feet above high- water mark. A pebble bed, at base not 

 much above high-water mark, occurs under Head, capped by blown 

 sand in the adjacent cliffs. 



Fig. 16. O.v Godrevy Beach. 



Kock Reef 70 yards from the Cliffs, bearing: traces of Raised Beach and capped by 

 a Pinnacle of Head. 



