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

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