A granite would form under conditions that included
A) a mafic magma cooling in the subsurface.
B) a felsic magma cooling in the subsurface.
C) a mafic magma cooling on Earth's surface.
D) a felsic magma cooling on Earth's surface.
E) none of the above.
Correct Answer:
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Q26: Aphanitic, phaneritic and porphyritic are textural terms
Q27: Large crystals found in a fine-grained groundmass
Q28: Natural glass such as obsidian forms when
A)
Q29: Pegmatite refers to
A) an extremely coarse texture
B)
Q30: Volcanic necks form when
A) the magma abruptly
Q32: A basalt would form under conditions that
Q33: If early-formed crystals settled out of a
Q34: A porhyritic texture indicates that the rock
Q35: Batholiths typically contain
A) phaneritic rocks composed predominantly
Q36: A sill is a
A) concordant, tabular body
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