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Rock from Earth’s mantle, called peridotite, that is dark grey when fresh, but now shows the effects of chemical reactions with seawater that alter it to a green-brown rock called serpentinite. Central equatorial Atlantic Ocean, Saint Peter and Saint Paul Archipelago, Brazil #STP17 [first published through bioGraphic, a program of the California Academy of Sciences] |

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20170629_182226.jpg
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Solvin Zankl
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5400x3594 / 5.6MB
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Rock from Earth’s mantle, called peridotite, that is dark grey when fresh, but now shows the effects of chemical reactions with seawater that alter it to a green-brown rock called serpentinite. Central equatorial Atlantic Ocean, Saint Peter and Saint Paul Archipelago, Brazil #STP17 [first published through bioGraphic, a program of the California Academy of Sciences] |