pierced stone khao hin thalu hole massive rocky cliff |
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navigate by keyword : background beach been black carbon caused close closeup coal coastal composed crystals decoration different dried dry erosion fused garden geologists geology gold green hole holes isolated lump macro mineral minerals mountain mountains natural nature ore outdoor oysters perched pyrite quartzite raw reef reefs rock rocks rocky sandy seaside small solid stone strange substance together wall waves winds |
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To geologists, a rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump. |
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