CONTENTS
CHAPTER XXIX The Carboniferous Volcanoes of England | |
| PAGE | |
| The North of England: Dykes, Great Whin Sill—The Derbyshire Toadstones—The Isle of Man—East Somerset—Devonshire | [1] |
CHAPTER XXX The Carboniferous Volcanoes of Ireland | |
| King's County—The Limerick Basin—The Volcanic Breccias of Doubtful Age in County Cork | [37] |
BOOK VII THE PERMIAN VOLCANOES CHAPTER XXXI The Permian Volcanoes of Scotland | |
| Geographical Changes at the Close of the Carboniferous Period—Land and Inland-Seas of Permian time—General Characteristics and Nature of the Materials erupted—Structure of the several Volcanic Districts: 1. Ayrshire, Nithsdale, Annandale; 2. Basin of the Firth of Forth | [53] |
CHAPTER XXXII Permian Volcanoes of England | |
| The Devonshire Centre—Eruptive Rocks of the Midland Coal-fields | [94] |
BOOK VIII THE VOLCANOES OF TERTIARY TIME CHAPTER XXXIII | |
| Vast lapse of time between the close of the Palæozoic and beginning of the Tertiary Volcanic Eruptions—Prolonged Volcanic Quiescence—Progress of Investigation among the Tertiary Volcanic Series of Britain | [107] |
CHAPTER XXXIV The System of Dykes in the Tertiary Volcanic Series | |
| Geographical Distribution—Two Types of Protrusion—Nature of component Rocks—Hade—Breadth—Interruptions of Lateral Continuity—Length—Persistence of Mineral Characters | [118] |
CHAPTER XXXV The System of Dykes—continued | |
| Direction—Termination upward—Known vertical extension—Evidence as to the movement of the Molten Rock in the Fissures—Branches and Veins—Connection of Dykes with Intrusive Sheets—Intersection of Dykes—Dykes of more than one infilling—Contact metamorphism of the Dykes—Relation of the Dykes to the Geological Structure of the Districts which they traverse—Data for estimating the Geological Age of the Dykes—Origin and History of the Dykes | [145] |
CHAPTER XXXVI The Plateaux | |
| Nature and Arrangement of the Rocks: 1. Lavas.—Basalts, Dolerites, Andesites—Structure of the Lavas in the Field—2. Fragmental Rocks.—Agglomerates, Conglomerates, and Breccias—Tuffs and their accompaniments | [181] |
CHAPTER XXXVII | |
| The Several Basalt-Plateaux and their Geological History—Antrim, Mull, Morven and Ardnamurchan | [199] |
CHAPTER XXXVIII | |
| The Basalt-Plateau of the Parish of Small Isles—Rivers of the Volcanic Period | [215] |
CHAPTER XXXIX | |
| The Basalt-Plateaux of Skye and of the Faroe Isles | [249] |
CHAPTER XL | |
| The Modern Volcanoes of Iceland as illustrative of the Tertiary Volcanic History of North-Western Europe | [260] |
CHAPTER XLI The Eruptive Vents of the Basalt-Plateaux | |
| Vents filled with Basalt or other Lava-form Rock—Vents filled with Agglomerate | [270] |
CHAPTER XLII | |
| The Basic Sills of the Basalt-Plateaux | [298] |
CHAPTER XLIII The Bosses and Sheets of Gabbro | |
| Petrography of the Rocks—Relations of the Gabbros to the other members of the Volcanic series—Description of the Gabbro districts—Skye | [327] |
CHAPTER XLIV | |
| The Bosses and Sheets of Gabbro in the Districts of Rum, Ardnamurchan, Mull, St. Kilda and North-East Ireland. History of the Gabbro Intrusions | [349] |
CHAPTER XLV The Acid Rocks | |
| Their Petrography—Their Stratigraphical Position and its Analogies in Central France | [364] |
CHAPTER XLVI | |
| Types of Structure in the Acid Rocks—Bosses | [378] |
CHAPTER XLVII | |
| The Acid Bosses of Mull, Small Isles, St. Kilda, Arran, and the North-East of Ireland | [395] |
CHAPTER XLVIII | |
| The Acid Sills, Dykes and Veins | [430] |
CHAPTER XLIX | |
| The Subsidences and Dislocations of the Plateaux | [447] |
CHAPTER L | |
| Effects of Denudation | [455] |
CHAPTER LI | |
| Summary and General Deductions | [466] |