﻿Vol. 6 1.] CARBONIFEROUS LIMESTONE OP WESTON- SEPER-M ARE. 551 



greater part of the hill, for over a mile east of Worlebury Camp, is 

 covered by Weston Woods. 



Throughout the ridge the beds dip in a southerly direction ; con- 

 sequently, the northern side forms a steep escarpment. On the 

 southern side, the ground drops steeply for about 150 feet, but 

 afterwards slopes away more gently to the alluvial flats which lie 

 between Weston and the Mendips. 



The general structure of the ridge is simple. A reversed fault, 

 running the whole length of the hill, has thrown beds of Syringo- 

 thyris-age, on the south, against beds of Seminula-age , on the 

 north. The throw of this fault cannot be determined with accuracy, 

 but it is not much less than 500 feet, and probably greater rather 

 than less. 



Considerable variation in the dip and strike of the beds, such as 

 would naturally be expected in the neighbourhood of a large fault, 

 is noted on traversing the ridge from end to end. On the coast 

 north of Weston, the ' laminosa-dolondtes ' [Lower Syringothyris- 

 Zone, CJ are in juxtaposition with Lower Seminula-Beds [SJ at the 

 fault. The general strike between Weston and Milton Hill approxi- 

 mates to east and west, and on the western part of Milton Hill 

 the fault comes out at about the same level in the Syringothyris- 

 Zone. Eastward from Milton Hill, however, the east-northeasterly 

 trend of the strike causes the beds of the SyringotJiyris-Zone to 

 successively overlap each other against the fault, and, consequently, 

 Upper Syringothyris-Beds [CJ come into contact with Upper 

 Semimda-Beds [IS J at the eastern end of Worle Hill. 



South of the fault there is a complete sequence from C z 

 to S 2 . The lowest beds seen form the upper part of the ' laminosa- 

 dolomites/ and are exposed on the coast, north of Weston ; they 

 lie some 500 feet below the top of the Sy ring othy vis-Zone. The 

 highest beds anywhere exposed occur at Xnightstone ; these lie 

 well up in S a , and roughly about 1000 feet above the ' laminosa- 

 dolomites.' 



North of the fault only the Seminula-Zone is represented. 

 Beds near the base of S x are seen on the coast, between Weston 

 and Kewstoke ; the highest beds represented, which are quarried 

 at the eastern end of Worle Hill, belong to S a . 



An obvious result of the fault is seen in a large overfold of the 

 Seminula-Bedsi on the north side of the fault. This fold can be 

 made out in the quarries at the eastern end of the ridge, and 

 traced westward for about two-thirds of a mile ; at a distance of 

 about a mile it apparently dies out. 



No good continuous section occurs anywhere in the ridge, the 

 coast-section being in a very unsatisfactory condition for examina- 

 tion. But certain parts of the sequence, notably the Upper 

 Syringothyris-Zone, on the south side of the hill, are extensively 

 quarried and are, therefore, well exposed for examination. 



