14 



CORNISH POST-TERTIARY GEOLOGY. 



(Fig. 5.) Pit No. 1. Distant from the Beacon more tlian 40 

 chains, in direction W. 39° N. In one part we have : — 



Blackish sandy soil with angular stones 1ft. Oin. 



Reddish and yellowish-brown sandy loam, full of angular frag- 

 ments of grit and quartz 



Loamy sand, red 



Bluish-grey and brownish loamy sand, occasionally containing 

 small angular fragments of dark-grey slate, and quartz, passing 

 horizontally into to 



Fine bluish-grey sand 3 to 



Drab and yellowish loam 



Stiff light-di-ab clay, passing downwards into 



Orange and yellow sand, not penetrated. 



(Fig. 6.) Pit No. 1. In another part, where the section is about 

 9 feet in depth. 



Eed-brown loam, with angular stones; of a lighter colour and with fewer 

 and smaller fragments at (a'); drab-coloured at (a-). Greenish and drab- 

 grey, tough sandy loam, containing, at (xx), bluish-grey, impersistent, 

 slightly clayey, bands ; fine bluish-grey sand, with small angular stones of 

 quartz, and dark-grey slate, here and there. 



In another part of the pit : 



Brownish and grey clay 3ft. Oin. 



Stiff bluish clay, with a thin band of granitic sand near the top 4ft. Oin. 

 Fine orange sand, yellowish in places, compact, exposed to a 



depth of 2ft. Gin. 



Fig. 5. Pit Xo. 1. 

 Vertical Scale 1 in. = 12 ft. 



Fig. 7. Pit No 



jOrojOrO-Or o^O- 



FiG. 6. Pit No. 1. 



(Fig. 7.) Pit No. 2 is about 45 chains from the Boacon, in a direc- 

 tion N. 39° W. The section is about 10 feet in depth : 

 Blackish sandy soil, with angular stones. 

 Dark-brown sand with small yellowish-red spots in places. 

 Yellowish and orange sand. 

 Buff and grey sand. 

 Light-brown sand. 



Impersistent seam of bluish-grey clay. 

 The colours of the sands merge insensibly into one another. 



