328 Reports and Proceedings — Geological Society of London. 



as also to numerous puys of trachyte, phonolite, olivine -basalt , and 

 nepheline-basalt throughout Southern Bauchi, Muri, and Yola. 

 Repeated minor oscillations of the crust occurred during the latter 

 part of the Tertiary era, and culminated in the elevation ot the 

 Bauchi plateau, the depression of the Chad area, and the establishment 

 of the present river-system. 



2. May 10, 1911.— Professor W. W. Watts, Sc.D., M.Sc, F.E.S., 

 President, in the Chair. 



The following communications were read : — 



1. "The Lower Carboniferous Succession in the North- West of 

 England." By Professor E. J. Garwood, M.A., Sec.G.S. 



The area dealt with includes the whole of Westmorland north and 

 west of the Dent Fault, together with North Lancashire to the north 

 of the Lune Valley, and the extreme northern corner of Yorkshire, to 

 the west of Middleton in Teesdale, is also included. 



The following general succession has been established : — 



Zones. 



Dibunopliyllum 



Procluctus 



corrugato-hemispliericus. 



Spiriferina laminosa. 



Sub-zones. 



Bonds. 



Upper (?) • • -. • 



,. , ,, ( Produchis latissimus. 



Middle J Lmsda i ia floriformis. 



Michclinia megastoma. 



Athyris glabristria. 



Lower 



Upper 

 Lower 



Cyathophyllum 



Murchisoni. 



Nematophylhvm minus 

 Cyrtina carbonaria 

 Gastropod Beds. 



Upper 

 Lower 



Daviesiella carinata. 

 Camarophoria 

 isorhyncha. 



Upper Seminula gregaria. 



Lower Solenojwra. 



Botany Beds. 

 i Saccammina. 

 \ GirvaneUa. 

 [ Cyrtina septosa. 

 \ Daviesiella 

 { llangollensis. 

 I Bryozoa Bed. 

 \ 

 Clisiophyllum 

 Keyserlingi. 



Spirifer 



cf . furcatus. 

 ThysanophijUum 



pseudo- 



vermicnlare. 

 Bhynchonella 



triplicata. 

 Productus 



globosus. 

 Eumetria proava 

 Pleurodktyuvi 



cleistoporoides. 



Probable 

 Bristol 



Equiva- 

 lents. 



D 2 



Di 



s 2 

 S. 



Basement Conglomerate. 



Spirifer pmskeyensis Beds. 



