Earth: An Introduction to Physical Geology (12th Edition)

by Tarbuck, Edward J.; Lutgens, Frederick K.; Tasa, Dennis G.

Published by Pearson

ISBN 10: 0134074254

ISBN 13: 978-0-13407-425-2

Chapter 5 - Section 5.1 - The Nature of Volcanic Eruptions - Concept Checks - Page 144: 2

Answer

List of three magmas arranged in descending order (from the most silica-rich to the least silica-rich): 1) Rhyolitic magma (most silica-rich) 2) Andesitic magma 3) Basaltic magma (least silica-rich)

Work Step by Step

Rhyolitic magma is composed of more than 70% of silica. Andesitic magma is composed of about 60% of silica. Basaltic magma is composed of about 50% of silica.

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