Vol. 60.] IGNK JUS ROCKS OF THE BRISTOL DISTRICT. 139 



with the beds of limestone and shale and altering them above and 

 below' (p. 22). and a section is given, drawn by Aveline. The 

 volcanic breccia at Cross Combe (Goblin Combe) is mentioned (Joe. 

 cit.) t but the occurrence of ' trap ' is not recorded. In an Appendix 

 (]). 210) Mr. Rutley describes the rock from Woodspring Hill 

 (Middle Hope) as a much-altered basalt, to which a specimen from 

 Cleve Combe (Goblin Combe) is closely similar: and that from 

 Wrington Warren, which is not identified as part of the Goblin- 

 Combe exposures, as a volcanic breccia. ' It is just possible,' says 

 Mr. Rutley, ' that this breccia may be derived from the margin of a 

 dyke' (p. 210). He had evidently not seen the rock in the Held. 

 Figures are given of some of these rocks. 



Prof. Sollas writing, 1 in 1880, an account of the Geology of the 

 Bristol District, in connection with an excursion of the Geologists' 

 Association, makes passing allusion to 



* an episode of igneous activity, which has left its traces in the thick beds of 

 volcanic ash associated with once vesicular but now amygdaloidal basaltic lava, 

 to be seen interbedded in the limestone along the coast-section from Weston- 

 super-Mare to Swallow Cliff.' 



Whether this refers to Spring Cove or Middle Hope is not clear : but 

 probably the latter locality was intended. 



In the 'Annual Report' of the Geological Survey for 139b' 

 brief allusion was made to the records of contemporaneous volcanic 

 activity at Middle Hope (pp. (51 62). One of us made brief reference 

 to them in the British Association Handbook published in 1898 

 (Bristol Meeting), and also drew attention to beds of volcanic ash 

 on Worle Hill to the east of the camp (above Kewstoke Steps). 

 Finally, in the ' Summary of Progress ' of the Geological Survey 

 for 1898, Sir Archibald Geikie & Mr. Strahan gave the fuller 

 account, already mentioned, of the Xorthern Somerset volcanic- 

 group. 



II. The Evidence for the Contemporaneous Origin of the 



Igneous Rocks. 



(1) At Middle Hope ( WoodspriDg) . 



The evidence for the contemporaneous origin of the igneous rocks 

 in this locality has been so well set iorth by Sir Archibald Geikie 

 & Mr. Strahan that little need here be added. There are four 

 exposures, three of which are described in the ' Summary of 

 Progress * of the Geological Survey for 1898. The fourth lies 

 farther to the east, where the coast-line trends sharply southward 



1 Proc. Geol. Assoc, vol. vi (I860) p. 37*. 



