XIV 
THE ANCIENT VOLCANOES OF GREAT BRITAIN 
fataric Action; v. Inward Dip of Rocks towards Necks; vi. Influence of contem- 
poraneous Denudation upon Volcanic Cones ; vii. Stages in the History of old Volcanic 
Vents 
CHAPTER VI 
Under^onnd Phases of Volcanic R<,tiou-conUmied. II. Subterranean Movements of the 
Magma ; i. Dykes and Veins ; ii. Sills and Laccolites ; iii. Bosses (Stocks, Culots), 
Conditions that govern the Intrusion of Molten Rock within the Ten-estrial Crust 
CHAPTER VII 
Influence of Volcanic Rooks on the Scenery of the Laud— Effects of Denudation 
BOOK II 
VOLCANIC ACTION IN PRE-CAMBRIAN TIME 
CHAPTER VHI 
Pbe-Oaiibrian Volcanoes 
The Beginnings of Geological History — Diiflciilties in fixing on a generally applicable 
Terminology— i. The Lewisian (Archaean) Gneiss ; ii. The Dalradian or Younger 
Schists of Scotland ; iii. The Gneisses and Schists of Anglesey ; iv. The Uriconian 
Volcanoes ; v. The Malvern Volcano ; vi. The Charnwood Forest Volcano 
BOOK III 
THE CAMBRIAN VOLCANOES 
CHAPTER IX 
Characteristics of the Cambrian System in Britain 
The Physical Geography of the Cambrian Period— The Pioneers of Palaiozoic Geology in 
Britain— Work of the Geological Survey in Wales— Subdivisions of the Cambrian 
System in Britain ...... 
CHAPTER X 
The C.ambrian Volcanoes of South Wales .... 
CHAPTER XI 
The Cambrian Volcanoes of North Wales, the Malvern Hills 
Warwickshire 
AND 
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