cut out black slate slab isolated white background homogeneous metamorphic rock |
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| navigate by keyword : background basalt black close coal conditions crystal cut formed generally geology granite homogeneous isolated low lowgrade macro metamorphic metamorphosis mineral mudstone nature object ore pressure relatively rock rough shale slab slate sometimes stone temperature texture white |
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| Slate is a low-grade metamorphic rock generally formed by the metamorphosis of mudstone or shale, or sometimes basalt, under relatively low pressure and temperature conditions. |
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