Multiple Choice
Pegmatites,which occur in dikes,are unusual among shallow intrusive rocks in that they ____________.
A) possess porphyritic texture
B) possess exceptionally coarse grains
C) are mineralogically identical to the extrusive rock basalt
D) are glassy,cooling so rapidly that crystals do not have time to form
Correct Answer:
Verified
Correct Answer:
Verified
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