The Ancient Volcanoes of Great Britain, Volume 1 (of 2)
CHAPTER IV
Materials erupted at the Surface--Extrusive Series--_continued_. iii. Types of old Volcanoes--1. The Vesuvian Type; 2. The Plateau or Fissure Type; 3. The Puy Type. iv. Determination of the relative Geological Dates of Ancient Volcanoes. v. How the Physical Geography associated with Ancient Volcanoes is ascertained 39