Tufa facts for kids
Tufa is a porous variety of limestone. It is formed by the precipitation of carbonate minerals from water at normal temperatures.
Geothermally heated hot springs sometimes produce similar (but less porous) carbonate deposits known as travertine.
Do not confuse with the rock made of volcanic ash, which is called tuff.
Images for kids
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Barrage Tufa at Cwm Nash, South Wales
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Rubaksa tufa plug, after drying of the river, in Ethiopia
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Tufa at Trona Pinnacles, California
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The Pyramid and Domes tufa rock structures, Pyramid Lake, Nevada
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Tufa dam in Chelekwot, Ethiopia
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Tufa Facts for Kids. Kiddle Encyclopedia.