Volcanoes By Eugene Brown | 23 Jan 2012 0 Comment PageDiscussionHistoryGeography CAPS > Grade 10 CAPS > Geomorphology > Volcanoes 1. Types of volcanoes: extrusive, intrusive, active, dormant and extinct.2. Structure of volcanoes.3. Impact of volcanoes on people and the environment: positive and negative.4. Case studies of different volcanic eruptions. 1. Types of volcanoes: extrusive, intrusive, active, dormant and extinct. VOLCANOES from calderiu 2. Structure of volcanoes. 3. Impact of volcanoes on people and the environment: positive and negative. Geothermal Energy in Iceland: 4. Case studies of different volcanic eruptions. E-mail: