138 PROFS. LLOYD MORGAN AND REYNOLDS ON THE [May I904, 



Broadtield Down near the upper terminus of Brockley Combe.' Dean 

 Buckland said that he was not aware that it had "been recognized 

 by any subsequent observer. And this statement still holds true, 

 unless (as is probable) that, speaking from memory, when he said 

 1 Brockley Combe ' he meant the neighbouring Goblin Combe, near 

 the upper end of which the fragmental deposits of the nature of 

 coarse tuffs are well seen. 



In the geological map of the Bristol Coalfield by William Sanders, 

 which was begun in 1840, at the instance of Sir Henry de la 

 Beche, and published in 1864, the following exposures ot 'trap' 

 are given : — 



(1) In the Uphill Cutting. 2 miles south of Weston-super-Mare (Sheet 12). 



(2) At Spring Cove, a little to the north-east of the pier, Weston-super-Mare 



(Sheet 12). 



(3) At Middle Hope, to the west of Woodspring Priory, 3 miles north-east of 



Weston-super-Mare (Sheet 8). 



(4) In Goblin Combe, 1£ miles north-east of Wrington (Sheet 9). Four 



exposures are marked, erroneously associated with Old Red Sandstone. 



(5) Near Cadbury Camp, 3 miles east-north-east of Clevedon (Sheets 5 and 9). 



Two exposures are marked. 



With the exception of the last, all these are indicated in the 

 Geological-Survey maps (1805). Two exposures are marked in 

 Goblin Combe, and the supposed association with Old Bed Sandstone 

 is corrected. 



In 1868 David Mackintosh ! noted the occurrence of the igneous 

 rock at Spring Cove, describing it as a conformable mass of trap. 

 He says that it 



' lias, I believe, hitherto been regarded as intrusive. But a comprehensive 

 inspection will, I think, show that it is a bed which, in a fused state, must have 

 flowed over the limestone beneath, before the limestone above was deposited.' 



In the same footnote Mackintosh states that Mr. Ravis, of Bristol, 

 had informed him that a similar bed of trap occurred in the lime- 

 stone near Sandpoint. This had, however, been previously recorded 

 in Sanders's map. In the same year Bavis ~ described the Middle 

 Hope trap, apparently regarding it as intrusive, but stating that it 

 was probably injected during the deposition, although before the 

 elevation of the limestone. 



Tn Mr. Horace B. Woodward's Survey Memoir on 'The Geology 

 of East Somerset,' published in 1876, a section, by Sanders, of the 

 cutting at Uphill is given (pi. iii, facing p. 24), in which the igneous 

 rock is entered as ' trap dyke.' A note is contributed by W. T. 

 Aveline on the ; large igneous dyke ' at Middle Hope ' miming 



1 Quart. Journ. Geol. Soc. vol. xxiv (1868) p. 282. 



2 ' Supplementary Notes on some of the late Movements on the Somersetshire 

 Coast' Proc. Bristol Nat. Soc. ser. 1, vol. iii (1868) p. 89. 



