28 



OHOLOaY OF 'ITIK AVON BA3IW. 



connection of tlio groups nnmborod above 1, 2, i, iiiid 5, 

 would scorn to bo as follows. Group 1, of sti'ata dip})iiig 

 gently S.S.E., are the normal strata, but these along the 

 dotted lino in the map are locally folded, there being 

 probably a synclinal axis a little to the N.W. of the line. 

 This brings up the Old Eed Sandstone on either side of 

 Fore Hill and near the landing stage. On tho other hand, 

 to tho north of Wood Hill the strata are folded over so !is 

 to dip steeply towards the Severn, the lino joining the 

 contorted Bryozoa bed in Wood Hill Bay, and tlio same bed 

 similarly contorted in tlio Hrnall quarry west of Wood ]lill, 

 marking the apex of this steep fold. It mny bo that the 

 limestone here, as well as being folded, is slightly faulted, 

 down; and there seems to have been a slight shifting down 

 between the beds of Battery Point and those of the woody 

 ridge farther E. along the line where tho Dolomitic Con- 

 glomerate is shown on the map. These shiftings are, 

 however, of slight amount and of minor importance. 



There remains for explanation the Mountain Limestone 

 of Fore Hill. These beds cannot be brought into dii-ect 

 relation with the Old Red Sandstone in tho lanes whiclr 

 lie to the north and south of the hill. It is clear that 

 they are brought to their present position by tho action of 

 a fault. This was seen by Mr. W. W. Stoddart ; and I 

 hero reproduce his section from our Proceedings (Now 

 Series, vol. i., p. 272), that his interpretation of the facts 

 may be compared with that to which my own investigations 

 have led me (Fig. 2). 



It will be seen that, on Mr. Stoddart's view, the reappear- 

 ance of Old Red Sandstone in tho lanes is due to upthrow 

 by the fault, and, although his linos which distinguish tho 

 limestone end off against the Old Red, I take it that this 

 limestones is intcindcid to be I'epresented as rc^posing com- 



