﻿24 



PROF. S. H. REYNOLDS ON THE 



[vol. Ixxii, 



This is illustrated by vertical sections showing the position of the 

 volcanic series in the Carboniferous sequence of the district, and by 

 three reproductions of photographs. 



5. In 1912, in connexion with the preparation of the second edition of the 



Geological Survey Memoir explanatory of Sheet 263, ' The Country 

 around Cardiff,' Dr. Strahan re-examined the exposures of the Weston- 

 super-Mare district, and recorded certain fresh ones (pp. 26-35). 



6. The rocks are described in my Geological Excursion Handbook for the 



Bristol district (published by Arrowsmith in 1912) : Excursions 8, 11, 

 12, 13. 



Note. — In connexion with the investigations recorded in this paper, more 

 than fifty trial-holes were dug. The cost of these, as also of the chemical 

 analyses, was defrayed by grants from the University-of-Bristol Colston 

 Society. Unless otherwise stated, the analyses were all carried out by 

 Mr. E. G. Radley. 



Fig. 1. — Sketch-map of the igneous exposures in Goblin Combe, 

 on the scale of 4 inches to the mile. 



II. Field Eelations of the Kocks. 

 (a) Goblin Combe. 



The existence of volcanic rocks in Goblin Combe was first proved 

 by William Sanders, whose map, published in 1864, shows four 

 exposures : two small ones near the eastern end of the Combe, and 

 two farther west. 



