﻿Vol. 6 1. 1 



SEQUENCE IN THE BRISTOL AREA. 



197 



D = Zone of Dibunophyllum afr*. turbinatum 



(DlBUNOPHYLLUM-TiOMQ) . 



Lithological character. — In ascending order: 



(1) Massive limestones. 



(2) Shales and grits. 



(3) Massive limestones. 



(4) Shales. 



Former designation : 



(1) The upper part of the Middle Limestone. 



(2) The Upper Limestone-Shales (lower part). 



(3) The Upper Limestone in the Upper Limestone-Shales. 



(4) The Upper Limestone-Shales (upper part). 



Where exposed in the Avon section : — 

 Clifton side : 



On either side of the new Zigzag Path and, along the side of 

 the railway-line, between the bottom of that path and the 

 tunnel-entrance (near Point Villa). 



In small exposures along the riverside path, from the entrance 

 to the new Zigzag up to Point Villa, and in a continuous ex- 

 posure from that point to the wall at the bottom of Bridge Valley- 

 Road, also along the side of Bridge Valley-Road. 



In the repetition of the series after the fault, this zone is met 

 with just before the wall at the bottom of the old Zigzag Path; 

 and, after passing the entrance to that path, it extends con- 

 tinuously up to the Rocks Railway. Beyond this point the beds 

 are hidden by the Colonnade, and, farther on, by St. Vincent's 

 Parade. 



Leigh Woods side : 



Near the point on that side and, after a considerable break, in 

 Quarry 6 at the foot of Stokeleigh Camp and in the exposures on 

 the side of the camp. 



In the repetition of the series after the fault, the zone can 

 again be studied in the Quarry on Rownham Hill. 



Coral-fauna : 



Alveolites septosa and varieties. 



Syringopora cf. distans. 



Syringopora cf. geniculates 



Lithrostrotion Martini and vari- 

 ants (especially towards L. 

 irregular e and Lonsdalia). 



Lithostrotion irregulare and vari- 

 ants. 



Lithostrotion junceum. 



Lithostrotion Portlocki and vari- 

 ants (such as L. M'Coyanam, 

 L. ensifer). 



Q.J.G.S. ISTo. 242. 



Cyathophyllu/,1 Marchisoni and 



variants. 

 Cyathophyllum regium. 

 Campophyllum aff. Murchisoni. 

 Clisiophyllids of numerous types 



(such as Clisiophyllum 9 and 



the group of Dibunophyllum 



aff. turbinatum). 

 Lonsdalia floriformis. 

 Lonsdalia aff. rugosa. 

 Axophyllum 9. 



