170 W. A. E. TJssher — Post- Tertiary Geology of Cornwall. 



Brown earth with large and small angular stones 10ft. to 15ft. 



upon — large pehbles and subangular fragments of quartz and 



greenstone 1ft. 



upon — brown loam with small angular quartz stones and large 



angular greenstone boulders. 



g' . In another place — 



Soil _ 2ft. to 3ft. 



Brown loam with angular greenstone fragments 6ft. to 7ft. 



As above, fragments fewer, and, as a rule, smaller 10ft. to 15ft. 



Pebbles, and occasionally subangular fragments, of quartz 



and greenstone 2ft. (about). 



resting unevenly upon greenstone, at from 8 to 12 feet above high, 

 water. 



h. Toward Marazion the cliffs average 20 feet in height, and are 

 composed of a Head of angular slate, quartz, and greenstone frag- 

 ments in brown loam. 



10. South of Penzance. 



a. Mr. Carne (T. E. Gr. S. Corn. vol. iii. p. 229) observed layers of 

 pebbles and boulders from 3 to 6 feet thick, and 40 feet in length, at 

 the junction of the slate and granite at Mousehole. Mr. Hen wood 

 gives the height of the above as a little above high-water mark. 

 (Ibid. vol. v. p. 110.) 



The following are from Mr. Carne's paper (op. cit.). 



b. At Cam Silver, boulders and pebbles were found in the end of 

 a cavern, 8 feet wide and 12 feet high, once probably filled with 

 them. 



c. In St. Loy Cove, under 30 feet of Head of granitic stones in 

 clay, pebbles and boulders were observed, 4 to 8 feet in thickness, 

 150 feet in length, and at their base at high- water mark. (Present 

 beach composed of granite boulders. — W.U.) 



d. Boulders were also observed at Polwarnon (? Polguaruon) Cove, 

 Lean Scath, Pednvounder Cove (near the Logan rock), and at the 

 Land's End Hole, but their height above the sea is not given. 



e. Near Penberth on the east, I noticed a small patch of Head 

 composed of brown loam with angular stones and angular and sub- 

 angular boulders. 



11. Land's End. 



a. In Whitesand Bay, near Cam Aire, the Head consists of angular 

 and subangular fragments and boulders of granite in coarse light buff- 

 brown granitic debris (growan), becoming browner and more loamy 

 near the base. The present beach is composed of granite boulders. 



b. Between Creagle and Aire Points, Mr. Carne (op. cit.) observed 

 6 feet of boulders and pebbles under 30 feet of clay with granitic 

 fragments. Base of boulder bed at about spring tide high water. 



c. On the south of the Nanjulian Biver (Carne, op. cit.) boulders 

 and pebbles occur at 15 feet above high water. 



d. On the south of Pol Pry (op. cit.), a thin bed of boulders at 20 

 feet above high water. 



e. In an iron vein at Huel Oak Point (op. cit.) boulders were 

 found at 8 feet above high water. 



12. Pornanvon and Porth Just. 



