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Crossword clues

Solve these clues to fill the grid.

Molten rock in the earth's crust
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The commonest type of solidified lava
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To sail to the windward of
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Hard outer layer of the Earth or of bread
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A sedimentary rock consisting of sand consolidated with some cement
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The central part of the Earth
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The phenomenon of sediment or gravel accumulating
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Mountain that erupts with lava
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The layer of the earth between the crust and the core
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A tiny piece of anything (plural)
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A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
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The forcing of molten rock into fissures or between strata of an earlier rock formation
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A rock formed by the solidification of a substance (plural)
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Plutonic igneous rock having visibly crystalline texture
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A hard crystalline metamorphic rock that takes a high polish
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Fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
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