Why is the texture of the igneous rock obsidian glassy?
A) Obsidian commonly forms at the surface of lava flows.
B) Obsidian always forms beneath the earth's surface.
C) Obsidian is aphanitic.
D) Obsidian is phaneric.

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The Answer of Why is the texture of the igneous rock obsidian glassy?
A) Obsidian commonly forms at the surface of lava flows.
B) Obsidian always forms beneath the earth's surface.
C) Obsidian is aphanitic.
D) Obsidian is phaneric.

Why Is the Texture of the Igneous Rock Obsidian Glassy