A) What minerals can you identify in this Andesite? B). The groundmass of this rock is dominated by an isotropic phase. What is it? Would you classify this phase as a mineral? Why, or why not? C. Are there any minerals visible in a thin section that you couldn’t identify in hand sample? Provide two ways that you can identify these minerals in thin section that you couldn’t in hand sample (e.g. what optical properties allow you to identify these minerals?) D. What kind of rock would form if this andesite had not erupted, and had instead fully crystallized in the crust?
A) What minerals can you identify in this Andesite? B). The groundmass of this rock is dominated by an isotropic phase. What is it? Would you classify this phase as a mineral? Why, or why not? C. Are there any minerals visible in a thin section that you couldn’t identify in hand sample? Provide two ways that you can identify these minerals in thin section that you couldn’t in hand sample (e.g. what optical properties allow you to identify these minerals?) D. What kind of rock would form if this andesite had not erupted, and had instead fully crystallized in the crust?
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
Related questions
Question
A) What minerals can you identify in this Andesite?
B). The groundmass of this rock is dominated by an isotropic phase. What is it? Would you
classify this phase as a mineral? Why, or why not?
C. Are there any minerals visible in a thin section that you couldn’t identify in hand sample?
Provide two ways that you can identify these minerals in thin section that you couldn’t in
hand sample (e.g. what optical properties allow you to identify these minerals?)
D. What kind of rock would form if this andesite had not erupted, and had instead fully
crystallized in the crust?
B). The groundmass of this rock is dominated by an isotropic phase. What is it? Would you
classify this phase as a mineral? Why, or why not?
C. Are there any minerals visible in a thin section that you couldn’t identify in hand sample?
Provide two ways that you can identify these minerals in thin section that you couldn’t in
hand sample (e.g. what optical properties allow you to identify these minerals?)
D. What kind of rock would form if this andesite had not erupted, and had instead fully
crystallized in the crust?
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