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The Bruce Murray Space Image Library

Serpentinization

Serpentinization

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Loren A. Roberts for The Planetary Society; Rocks: James St. John

Serpentinization
Beneath the ocean floor, iron-rich crustal materials like olivine and pyroxene react with water in a process called serpentinization. The reaction produces a green mineral called serpentine along with hydrogen gas and methane and also releases heat.

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