CORNISH POST-TERTIARY GEOLOGY, 17 



(Fig. 10.) Gerran's Bay. The base of tlie Eaised Beacli is only 

 a foot or two above the reach of spring-tides in some spots, although 

 its average elevation is between 5 and 15 feet above high- water mark. 



In one place the section consists of : 



Brown loam with angular stones of slate and quartz 10 to 15ft. 



Orange-colom-ed sand or loam 1ft. 



Eeddisli-brown sand with coarse and fine quartz gravel, and 



angular fragments of slaty rock, sometimes of large size ... 6ft. 



Fig. 10. Gkrean's Bat. Vertical Height of Cliflf, 25 to 30 feet. 



A ^Afl^ 



Near Pendowa, the beach is absent, and the angular accumulation 

 rests directly upon the slates. 



Falmouth. To the west of Pendennis Point, Head of flattish 

 angular slate fragments and large angular pieces of quartz in grey 

 loam, becoming reddish-brown near the base, rests upon — light 

 yellowish-brown loamy clay, containing a few small angular stones 

 on — dark-grey slates with quartz veins. 



South of the. Falmouth Hotel. 



Under Head, traces of a beacli or old river gravel of quartz pebbles 

 in a brown and blackish sandy matrix, consolidated in j)laces, rest 

 on a waterworn rock platform at from 3 to 6 feet above high- water 

 mark. 



Between the above and Swanpool Point, a bed of quartz pebbles, 

 2 feet in thickness, rests on slates at about 10 feet above high-water 

 mark. 



Near Bream, to the south of Maen Porth, under stony loam, 4 feet 

 of blackish and brown sand, with angular slate fragments, is exposed 

 in the cliffs at from 10 to 15 feet above high-water mark. Beefs of 



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