### Question 7**What is the percentage of Quartz:**- **In Felsic rocks:** .....................%- **In Intermediate rocks:** .....................%This question prompts students to fill in the blanks for the percentage of quartz found in felsic and intermediate rocks. Felsic rocks typically have higher quartz content than intermediate rocks, which should be considered when answering.

Answered: 7. What is the % of Quartz: in Felsic…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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The rocks on the basis of silica-content are classified into three categories. Felsic rocks are those, which have silica-content more than 65%. If silica is between 55 and 65%, these rocks are termed as intermediate. If silica content is found between 45 to 55 percent in the rocks, rocks are termed as mafic and if silica content is below 45%, rocks are known as ultramafic.