Q. Which type of volcanic rock is formed from quickly cooled lava?

  • (A) Granite
  • (B) Obsidian
  • (C) Basalt
  • (D) Sandstone
✅ Correct Answer: (B) Obsidian
Explanation: Obsidian is a volcanic glass formed when lava cools rapidly, preventing crystal formation.

Published by Rati Dubey ⭐ 9.05K Points at 20-Sep-2025 07:13 am in Geography

Explanation by: Rati Dubey
Obsidian is a volcanic glass formed when lava cools rapidly, preventing crystal formation.

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