﻿552 ME. T. F. S1ELY ON THE CAKBON1FEEOUS [Aug. I905, 



(2) Detailed Stratigraphy. 

 (a) The Area South of the Fault. 



(i) The coast-section. — Along the coast, from north to 

 south, between the fault, some 400 yards E. 30° N. of Spring 

 Cove, and Knightstone, there is a section extending from the Lower 

 Syringothyris-Zone [CJ into the Upper Seminula-Zone [SJ. This 

 section is continuous as far as the base of S 2 , but a large gap is 

 caused in S 2 by Glentworth Bay. The dip and strike of the beds 

 vary slightly throughout the section, the mean dip being about 

 25° in a direction approximating to due south. The extremely- 

 weathered condition of the rocks renders the section unsatisfactory 

 for examination, and the faunal sequence cannot, therefore, be 

 made out with much completeness ; but the general succession may 

 be determined, by means of the fossils recorded from various levels. 



Syringothyris-Zotse. — Beds having a total vertical thickness of 

 rather over 500 feet, and extending from the fault as far as the 

 cliff under the Royal Pier Hotel, may be assigned to this zone. 



At the fault, we find fossiliferous beds of the Lower Seminula- 

 Zone in juxtaposition with dolomitic limestones, which are apparently 

 unfossiliferous. These latter beds form the upper part of the 

 < laminosa-dolomites,' and are succeeded by comparatively-unfossili- 

 ferous, very oolitic limestones ( = the ' Caninia -Oolite), which extend 

 to within a few yards of Spring Cove. 



Above this, a thick series of fossiliferous limestones, generally 

 oolitic, especially in the upper part, extends to the top of the zone. 

 A break is caused by the Spring-Cove volcanic series, which lies 

 about 450 feet below the top of the zone, and very near the base 

 of the fossiliferous limestones. 



Parts of this fossiliferous sequence are further exposed : (1) on 

 the north side of Worlebury Camp; (2) in the mural face above the 

 Kewstoke Road, a little west of the Tollgate ; (3) in the Gardens 

 above the Royal Pier Hotel. 



Semwi/la-Zoxe. — Fossiliferous beds in the cliff under the 

 Claremont Hotel may be regarded as lying approximately at the 

 base of this zone. They are succeeded by ironstained limestones, 

 which are apparently unfossiliferous, exposed in Madeira Cove and 

 at Anchor Head. Above these again come fossiliferous, ironstained 

 limestones, exposed on the foreshore under Claremont Crescent ; 

 these beds may be considered to terminate S 1? which has a total 

 thickness of about 170 feet. 



S 2 is very poorly displayed. The basal beds, consisting of highly- 

 fossiliferous limestones, are exposed under the Esplanade, on the 

 north side of Glentworth Bay. Then follows a gap, caused by the 

 sandy bay, in which some 300 feet of the sequence is lost. Finally, 

 at Knightstone, on the south side of the bay, fossiliferous, oolitic 

 limestones are seen, and these terminate the section. 



(ii) The Syringothyris-Zone as exposed on the south 

 side of the ridge. — The lower part of this zone is nowhere 



