Crystal Evidence (IMAGE)

Columbia Climate School

Crystal Evidence

Caption

Deep below the seabed, drilling revealed thick layers of salt, precipitated out during past warm, dry periods. In this specimen, transparent crystals (left) formed on what was then the bottom during winter; finer white ones (right) formed on the water surface in summer and later sank.

Credit

Yael Kiro/Lamont-Doherty Earth Observatory

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