CORNISH POST-TERTIARY GEOLOGY. 



15 



(Fig. 8.) Pit No. 3 is about 50 chains N. 25^^ W. from tlie Beacon : 



a. Brown clay with angular stones. 



b. Dark reddish-brown clay and loam, with angular stones. 



c. Orange, bright reddish, and yellow, fine sand. 



(a, b, and c dovetail, a being above, and c below.) 



d. Grey and light bluish-grey clay, loamy in places, and of a light 

 brown tinge toward the base, about four- feet thick. 



e. Fine light-grey sand, about four feet thick. 



f . Fine gamboge-coloured sand, orange in places, not penetrated. 



(Fig. 9.) Pit No. 4 is about 47 chains N. Q"" E. from the Beacon : 



Grey and blackish soil, with small angular stones, yellowish at 



the base 1ft. Oin. 



Brown loam, with angular stones resting irregularly on buff and 

 light-yellow fine sand, with angular fragments of slaty grit, 

 sometimes of large size 6ft. Oin. 



Fig. 8. Pit No. 3. 



Fig. 9. Pit No. 4. 



BOULDER BEDS. 



Mr. Hen wood * mentioned the occurrence of boulders at Morrab 

 Place, in Penzance, at 80 feet above the sea-level. At Lamorna 

 Cove, Mr. Came ^ noticed boulders of immense size in the roof of a 

 cavern ten feet above the highest tide. Between Lamorna Cove and 

 Mousehole he observed three to eight feet of boulders under 30 

 feet of angular fragments in clay, to the north-west of Carndu. 



Near Carn Bargis he noticed a mixture of boulders and angular 

 fragments, about 20 feet above high-tide level. The roof of Gamper 

 Hole is composed of granite boulders, under 20 feet of granite frag- 

 ments in clay, and is 40 feet above high-tide level. 



1 Trans. Roy. Geol. Soc. Corn. vol. v. p. 112. 



2 Jbid. vol iii. p. 229, etc. 



