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Geography, 25.09.2019 04:00 krystalScott17

An igneous rock that has a medium-gray, fine-grained groundmass with large crystals of plagioclase indicates that the lava flow that produced it cooled very quickly, forming the crystals. o is called diorite. is called pegmatite. crystallized at depth from intermediate-composition magma, and then rose to the surface and became a lava flow.

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