A porphyritic texture where large crystals are embedded in a matrix of small crystal may form when ________.
A)climate change causes crystals to cool at different rates
B)crystals of different compositions cool at different rates
C)crystals of different compositions grow to different sizes
D)a magma that has partially crystallized slowly moves to a different location where it then cools rapidly.

Question

Quizplus · Accepted Answer

A porphyritic texture forms when magma that has partially crystallized slowly moves to a different location where it then cools rapidly, allowing large crystals to form first, followed by smaller crystals.

A Porphyritic Texture Where Large Crystals Are Embedded in a Matrix