﻿part 1] IGNEOUS KOCKS OF THE BRISTOL DISTRICT. 



33 



All attempts, either to trace the lava eastwards from Spring 

 Cove through the woods of Worlebury Hill, or, with the exception 

 of that at Florence Cottage, to find any exposures east of the 

 cross-roads at Milton Hill, have been unsuccessful. 



(e) Middle Hope or Woodspring. 



There are four exposures of the igneous series in this section. 



First or western exposure. — Previous descriptions of the 

 lava have alluded to it as a band 12 or 14 feet thick, and this is 

 the case at the seaward end of the section. If, however, the whole 

 length of the section, some 50 feet along the strike of the rocks, is 

 examined, it will be seen that the lava forms a most irregular and 

 discontinuous band, as shown in the sketch (fig. 7, p. 32). The 

 calcite-amygdules, 4 inches long, mentioned by Sir Archibald Geikie 

 and Dr. Strahan, are near the top of the exposure at its western end. 

 Bands of tuff in places strike up against, and are truncated by, the 

 pillowy lava-masses. Chert-bands, strongly contorted in places, are 

 associated with the tuff. 1 



The only other additional fact worthy of record is that a well- 

 marked band of vesicular lapilli, which reach a length of 2 inches, 

 occurs at the base of the limestone overlying the igneous series. 



Second exposure. — The opportunity may be taken of correct- 

 ing a misprint in the section described on p. 141, Q. J. G. S. vol. lx 

 (1904) : in Band 19 ' grit' is a misprint for 'gap.' In the tuff- 

 band 9 of this section a few gastropods occur, as also lamelli- 

 branchs. 



Third exposure. — These rocks are considerably disturbed : the 

 main series of tuffs and thin limestone-bands is bent into an 

 irregular basin-shaped fold, and some of the thinner bands in the 

 upper part of the section are much contorted. Crinoids abound in 

 the more calcareous portions: these are sometimes definite, more or 

 less lenticular bands of limestone, sometimes they merely are highly 

 calcareous patches of tuff. Bands full of lamellibranchs occur at 

 intervals throughout the series of tuffs, and gastropods are met 

 with occasionally. A large mass of Miclielinia favosa Goldfuss 

 was obtained in one of the cajcareous tuff-bands, and two .rolled 

 masses with portions of tuff still adhering to them were found 

 on the foreshore. The British Museum also contains a specimen 

 in tuff, collected by Mr. Spencer Perceval at this locality in 1890. 



1 [In the greenish tuff immediately overlying: the lava a single specimen of 

 each of the following bracbiopods was found during a visit to this section with 

 Prof. E. J. Garwood, in September 1916 : — Gamaroplioria isorhyncha McCoy, 

 Spiriferina laminosa (not McCoy), and a Terebratulid. Prof. T. F. Sibly 

 kindlv examined the Spiriferid and Terebratulid. — S. H. B., March 20th, 

 1917.'] 



Q. J. G. S. No. 285. 



D 



