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tufa |
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tufaSoft, porous, limestone rock, white in colour, deposited from solution from carbonate-saturated ground water around hot springs and in caves. Undersea tufa columns, such as those in the Ikka Fjord in southwestern Greenland, that form over alkaline springs, can reach 20 m/65 ft in height and grow at about 50 cm/20 in per year. They provide a habitat for a wide variety of marine life. |
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