Freshwater Lenses on Micronesian Atolls
密克罗尼西亚环礁淡水透镜
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Micronesian atolls are rings of coral islands surrounding shallow lagoons, built atop submerged volcanic peaks hundreds of meters below sea level.
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Rainwater percolates through porous coral sand and floats atop denser saltwater underground, forming a fragile freshwater lens shaped like a convex lens.
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