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His team analysed mud samples from Lough Monreagh in Ireland and discovered layers of white sediment made up of calcite crystals from algae.

他的团队分析了爱尔兰洛蒙雷阿湖泥浆样本，发现了由海藻中方解石晶体构成的白色沉淀物涡旋层。

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Some phytoplankton called coccolithophores are coated with white calcite that makes the water look bright turquoise when billions of them get together.

有一种被称作圆石藻的浮游植物当它们数以亿计浮现在海洋表面时，海水会显出明亮的青绿色。

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An hour and a half later the group reaches "the dome, " a 60-foot-high semicylinder of rock, one half of the face a deep blue manganese, the other bridal-white calcite.

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