XVI 
THE ANCIENT VOLCANOES OF GREAT BRITAIN 
CHAPTEE XVII 
PAGE 
Distribution op the Volcanic Centres in the Lower Old Red Sandstone 
— Characters op the Materials Erupted bv the Volcanoes . .271 
CHAPTER XVIII 
Structure and Arrangement op the Lower Old Red Sandstone Volcanic 
Rocks in the Field . . . , . .281 
CHAPTER XIX 
Volcanoes op the Lower Old Red Sandstone op “Lake Caledonia” 
De.soription of the several Volcanic Districts : “ Lake Caledonia,” its Chains of Volcanoes— 
The Northern Chain : Montrose Group— Ochil and Sidlaw Hills— the Arran and 
Cantyre Centre — the Ulster Centi'c ...... 
CHAPTER XX 
Volcanoes op the Lower Old Red Sandstone op “Lake Caledonia ” — continued 
The Southern Chain— Tlie Pentland Volcano— The Biggar Centre— The Duneaton Centre 
— The Ayrshire Volcanoes 317 
CHAPTER XXI 
Volcanoes op the Lower Old Red Sandstone op the Cheviot Hills, Lorne, 
“Lake Orcadie” and Killarney ..... 
336 
CHAPTER XXH 
Volcanoes op the Upper Old Red S.andstone 
THE North op Scotland 
— The South-IVest op Irel.and, 
. 348 
BOOK VI 
THE CARBONIFEROUS VOLCANOES 
CHAPTER XXIH 
The Carboniferous Sy'stem op Britain and its Volcanic Records 
Geography and Scenery of the Carboniferous Period — Range of V’olcanic Eruptions during 
that time — I. The Carboniferous Volcanoes of Scotland — Di.stribution, Arrangement 
and Local Characters of the Carboniferous Sy.steni in Scotland — Sketch of the Work 
of previous Observers in this Subject ....... 355 
