62 PROCEEDINGS ‘COTTESWOLD CLUB I90I 
of the following phenomena: (1.) The effects of 
marine and atmospheric agencies on a rising and falling 
land area; and (2.) the mode of occurrence of rocks 
deposited under such variable bathymetrical conditions. 
In late Keuper times, the view from Wrington Island 
(fig. 1), over the waters of the Keuper Sea, would 
probably have been as follows*:—About twelve miles to 
the south-east would have stretched Mendip Island, its 
eastward extension being prolonged past Nunney’ for 
some distance under the area now occupied by Jurassic 
rocks. West of this island, and probably separated by the 
Strait of Maesbury was the larger island of Blackdown. 
In its northern shore was Harptree Bay, whilst its west- 
ward extension terminated in two promontories with the 
deep Rowberrow Bay between. The more southerly of 
the two promontories was almost divided from the main 
island by a deep inlet, now pierced by the Wells and 
Yatton Railway. The coast line was much indented, and 
in the Wells district there were, in all probability, several 
islets. West of Blackdown, Banwell and Bleadon stood 
out as separate islands, as is proved by the circum- 
ambient Keuper Conglomerate. Brean, Worle, and 
Swallow Cliff were probably separate islands; whilst further 
west, intermediate between the Mendip Archipelago and 
the mainland round Cardiff Bay, stood out The Holmes. 
In their present insulated and denuded state their 
geographical restoration requires caution; but the Wolves 
Rocks, now a little to the west of the Flat Holme, may 
be justifiably included within the the area of the latter. 
To the south, over Bleadon Isle, could be seen the large 
island of Quantock, with the rugged shore of the mainland 
1 The map here presented differs in but few details from that given in Prof. C. Lloyd 
Morgan’s “The Mendips; A Geological Reverie,” Proc. Bristol Nat. Soc. (Series ii.), 
vol. v., pp. 250, e¢ sgq. 
2 This eastward extension was probably much further than is shown on the Map. 
ae 
