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Q · Rocks and Rock CyclesMedium · 45s
Which of these rocks is glassy in texture due to rapid cooling?
TopicRocks and Rock Cycles
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.25
Test Duration30 min
Step-by-Step Solution
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Obsidian cools so quickly that crystals do not form, giving a glassy texture.
Final Answer: Option A — Obsidian