Hard, solid natural formations made of minerals that form the Earth's crust, or something that is really good or impressive.
From Old French 'roque,' possibly from a pre-Latin language; the slang usage meaning 'is great' emerged in the 1980s rock music culture.
Geologists study rocks to read Earth's biography—layers of rock act like a time capsule, recording millions of years of volcanic eruptions, meteorite impacts, and dinosaur existence all in one stone.
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