Large crystals found in a fine-grained groundmass can indicate:a
origin from a magma with an early intrusive phase followed by an extrusive phase.
b. origin from a magma with an early extrusive phase followed by an intrusive phase.
c. a rock of mixed volcanic-plutonic origin.
d. origin from a magma with an early intrusive phase followed by an extrusive phase AND a
rock of mixed volcanic-plutonic origin.
e. origin from a magma with an early extrusive phase followed by an intrusive phase AND a
rock of mixed volcanic-plutonic origin.
D
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