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Stilbite

A plagioclase mineral and zeolite, Na2Ca4[Al10Si26O72].34H2O

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Stamp

To break up ore by crushing and compaction

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Stalagmite

A cone shaped or cylindrical deposit of precipitated minerals that develops from a floor or low area upward

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Subduction

When a plate of the earth crust is pushed back into the Earth’s mantle by the force of the descending plate