W. A. E. Ussher — Post- Tertiary Geology of Cornwall. 205 



angular Head. The upper bed forms the roof of a cavern in the 

 slates. (Fig. 4.) 



;|s°°4^4| He,,. 



Fig. 4.— Godrevy. Vertical scale — 1 inch. = 24 feet. 



Ji. A portion of the consolidated raised beach is visible on the fore- 

 shore resting upon two bosses of a water worn slate reef. The denu- 

 dation of the reef has scarcely affected the unsupported part of the 

 under surface of the beach. (Fig. 5.) 



Fig. 5. — Godrevy Beach. 

 Portion of Kaised Beach resting on bosses of Slate isolated from the main cliff. 



i. Toward Godrevy Island the beach consists of coarse blackish 

 consolidated sand with pebbles, more gravelly at the base, 4 feet thick, 

 under thick beds of consolidated buff and grey sand with pebbles 

 disseminated through the lower parts. 



j. Dr. Paris (T. E. G. S. Corn. vol. i. p. 7). noticed a mass of sand 

 near Godrevy Island, containing whole shells and slate fragments, 

 12 to 20 feet thick, and 100 feet in length. 



h. Dr. Boase (T. E. G. S. Corn. vol. iv. p. 469) described a bed of 

 pebbles above high water, at Godrevy Point and around Fistral Bay, 

 overlain by a bed of testaceous sand; under "transported but un- 

 altered debris," in one place (op. cit. p. 309) described as 20 feet of 

 ferruginous clay with angular fragments (local), thinning out land- 

 wards as the ground rises. 



1. Mr. Whitley (Journ. E. Inst. Corn. No. 11. p. 184) gives a sec- 

 tion of the cliffs under Godrevy Farm from top to base. 



Brown loam soil 6in. to 18in. 



Clay and loam with numerous angular fragments of quartz... 6ft. to 16ft. 

 Sandy loam mixed with siliceous sand, and portions of a bed 



