﻿Yol. 6 1.] LIMESTONE OF WESTON-SUPER-MARE DISTRICT. 549 



Both the stratigraphy and the faunal sequence are dealt with fully 

 in this paper. The determination of the stratigraphical features 

 of the Limestone has been rendered easier by the palseontological 

 work : this affords an illustration of the advantage of relying 

 on the assemblage of corals and brachiopods for the approximate 

 determination of horizons in the Carboniferous Limestone. 



The structural features of the Woodspring ridge do not call for 

 special attention, and are, therefore, treated briefly. A compre- 

 hensive account of the faunal sequence displayed there is given. 



The geographical position of the Carboniferous Limestone of the 

 Weston district, lying as it does adjacent to the Bristol area, on 

 the north-east, and the Mendip area, on the south-east, suggests the 

 probability of an intermediate type of development being found 

 there : and this suggestion has been verified by the examination of 

 the district. A comparison with neighbouring areas is appended 

 to the detailed part of the paper. 



In carrying out my work, I have received much encouragement 

 and assistance from other geologists. I am deeply indebted to 

 Dr. Arthur Yaughan, Prof. C. Lloyd Morgan, and Prof. S. H. 

 Reynolds, for their advice and encouragement. I wish to thank 

 Dr. Yaughan for his continual and ungrudging assistance in the 

 palseontological work •; to Mr. P. P. Burt I am indebted for much 

 assistance in the field ; and I owe the photograph (fig. 3) illustrating 

 this paper to the kindness of Prof. S. H. Reynolds. 



Synopsis op the Zones and Subzones op the Carboniferous Limestone 

 represented in the weston-super-mare district. 



Zones. Subzones and Horizons. Symbols. 



o . (Produchis aff. Cora (rnut.) S 2 



" {Productus semireticulatus (mut.) S x 



Symngothyris {[Upper] C 2 



[ [Lower] C x 

 Horizon y. 



Zaphrentis Schizophoria resupinata Z 2 



II. The Weston-Worle Ridge. 

 (1) Topography and General Stratigraphy. 



The Carboniferous Limestone in the immediate neighbourhood of 

 Weston-super-Mare forms a bold ridge, some 3 miles in length, 

 which runs in a direction nearly 15° north of east from the coast, 

 at Weston, to Worle, and rises to a maximum height of about 

 350 feet above sea-level near the middle of its length. The average 

 height of the top of the ridge is rather over 300 feet, and the out- 

 crop of the Carboniferous Limestone has a fairly- constant width of 

 nearly a mile. 



The various parts of the ridge, taking them in order eastward 

 from Weston, are respectively called: Worlebury Hill (with Worle- 

 bury Camp at the western end), Milton Hill, and Worle Hill. The 



