EOSC 114 Study Guide - Final Guide: Magma Chamber, Mantle Plume, Mafic

• School: UBC
• Department: Earth and Ocean Sciences
• Course: EOSC 114
• Professor: Lucy Porritt

Document Summary

10-10^15 pa s (higher viscosity than water) Identify key properties (density, viscosity, silica content, & temperature) of different types of magma. Magma rises > lower p > less solubility > bubbles. Created by pre-existing rock below the earth"s surface. Magma channels - magma moves along cracks in the earth"s crust - forming dikes & sills. Magma ponds below the earth"s surface in large chambers. Describe the different types of eruptions and how they are related to magma properties. Free chunks of very angular lava pieces. Lecture 2 - types of volcanoes & eruptions. Low gas content + low viscosity = effusive eruptions. High gas content + high viscosity = explosive eruptions. Describe the type of volcano that occurs at hot spots. Ex. hawaiian/emperor volcanic chain (85 ma of volcanic activity related to 1 mantle plume) Describe the morphology, dominant rock type and typical eruption style of the different types of volcanoes. Lava erupts from fissure, runs down gentle slopes, cooling.