CONTENTS 
xvu 
CHAPTER XXIV 
Caeboniferous Volcanic Plateaux of Scotland 
PACE 
I. The Plateau-ty]ie restricted to Scotland — i. Distribution in the Different Areas of 
Eruption — ii. Nature of the Materials Erupted 367 
CHAPTER XXV 
Geological Structure of the Carboniferous Volcanic 
Plateaux op Scotland 
!• Bedded Lavas and Tuffs ; Upper Limits and Original Areas and Slopes of the Plateaux ; 
2. Vents; Necks of Agglomerate and Tuff; Necks of Massive Rock; Composite 
Necks ; 3. Dykes and Sills ; 4. Close of the Plateau- eruptions 
CHAPTER XXVI 
The Carboniferous Puys op Scotland 
i- General Character and Distribution of the Puys ; ii. Nature of the Materials Erupted 
—Lavas Ejected at the Surface— Intrusive Sheets— Necks and Dykes— Tuffs . 
CHAPTER XXVH 
Geological Structure of the Carboniferous Puys of Scotland 
1- Vents ; Relation of the Necks to the Rocks through which they rise— Evidence of the 
probable Subaerial Character of some of the Cones or Puys of Tuff— Entombment of 
the Volcanic Cones and their Relation to the Superficial Ejections. 2. Bedded Tufts 
and Lavas — Effects of Subsequent Dislocations. 3. Sills, Bosses, and Dykes 
CHAPTER XXVITI 
Illustrative Examples of the Carboniferous Puys of Scotland 
The Basin of the Firth of Forth — North Ayrshire — Liddesdale . . . • 
