C. REFLECT & DISCUSS The rock shown in Fig. A5.2.2ª has a porphyritic texture, which means that it contains two sizes of crystals. The large white plagioclase crystals are called phenocrysts and are in a green-gray groundmass of more abundant, smaller crystals. Based on your work in part A, explain how this texture might have formed. More than one potentially correct answer is possible. Figure A5.2.2
C. REFLECT & DISCUSS The rock shown in Fig. A5.2.2ª has a porphyritic texture, which means that it contains two sizes of crystals. The large white plagioclase crystals are called phenocrysts and are in a green-gray groundmass of more abundant, smaller crystals. Based on your work in part A, explain how this texture might have formed. More than one potentially correct answer is possible. Figure A5.2.2
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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Question
![C. REFLECT & DISCUSS The rock shown in Fig. A5.2.20 has a porphyritic
texture, which means that it contains two sizes of crystals. The large white
plagioclase crystals are called phenocrysts and are in a green-gray
groundmass of more abundant, smaller crystals. Based on your work in
part A, explain how this texture might have formed. More than one
potentially correct answer is possible.
Figure A5.2.2
x1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb9e6f454-aef3-4078-bf5c-8f7a3cacb5c5%2F700b8e35-9336-4345-a5e3-4b3d100d6cb1%2Ftq2abwo_processed.png&w=3840&q=75)
Transcribed Image Text:C. REFLECT & DISCUSS The rock shown in Fig. A5.2.20 has a porphyritic
texture, which means that it contains two sizes of crystals. The large white
plagioclase crystals are called phenocrysts and are in a green-gray
groundmass of more abundant, smaller crystals. Based on your work in
part A, explain how this texture might have formed. More than one
potentially correct answer is possible.
Figure A5.2.2
x1
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