Granitic magma intrudes into a large mass of limestone wall rock. In the metamorphic (contact) aureole, the rock closest to the pluton would be changed into: O porcelain gneiss O phyllite O mylonite O marble
Granitic magma intrudes into a large mass of limestone wall rock. In the metamorphic (contact) aureole, the rock closest to the pluton would be changed into: O porcelain gneiss O phyllite O mylonite O marble
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
Transcribed Image Text:Granitic magma intrudes into a large mass
of limestone wall rock. In the
metamorphic (contact) aureole, the rock
closest to the pluton would be changed
into:
O porcelain
O gneiss
Ophyllite
O mylonite
O marble
Expert Solution
Explanation:
In this case, contact metamorphism will take place because the granitic magma is intruding into a significant volume of limestone wall rock. A type of metamorphism called contact metamorphism takes place when hot magma comes into touch with cooler rock, changing the original rock.
Marble would be the metamorphic rock that formed nearest to the pluton (the intrusive body). This is because the high temperatures from the magma will cause the calcium carbonate in the limestone to recrystallize into marble.
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