An Igneous Rock with a Mixed Texture of Coarse Crystals

question 21

Multiple Choice

An igneous rock with a mixed texture of coarse crystals (phenocrysts) surrounded by fine crystals (groundmass) is termed ________.

• A)porphyritic
• B)phaneritic
• C)aphanitic
• D)necrotic

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Definitions:

Temporal Bone

A pair of bones situated at the sides and base of the skull, contributing to the skull's structure and housing the organs of hearing and equilibrium.

Sphenoid Bone

A complex, butterfly-shaped bone at the base of the skull, which forms part of the eye socket, the nasal cavity, and the floor of the cranium.

Temporal Bone

A bone situated at the sides and base of the skull, containing the structures of the ear.

Sternum

A flat bone located in the center of the chest, serving as a major attachment point for ribs and protecting vital chest organs.