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geyserite
EntityQ1976078· pop 13· linked from 255 articles

Also known as siliceous sinter

thumb|Geyserite from Iceland

Wikidata facts

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sinter
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Geyserite.jpg
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Geyserite
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thumb|Geyserite from Iceland

Geyserite, or siliceous sinter, is a form of opaline silica that is often found as crusts or layers around hot springs and geysers. Botryoidal geyserite is known as fiorite. Geyserite is porous due to the silica enclosing many small cavities. Siliceous sinter should not be confused with calcareous sinter, which is made of calcium carbonate.

Excerpted from Wikipedia’s “geyserite” article, available under the CC BY-SA 4.0 licence.

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