A desert rose formed by aggregate of Gypsum

A desert rose formed by aggregate of Gypsum

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Credit: ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY

Caption: Desert Rose. A desert rose is a rosette-shaped aggregate of gypsum (hydrated calcium sulphate), often incorporating grains of sand. Desert roses are formed over time as wind blows sand over aggregates of gypsum. These harden to form the individual "petals". Gypsum is a common sedimentary evaporite; a mineral deposited during the evaporation of salt lakes or sea water.

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Keywords: aggregate, desert, desert rose, gypsum, rose, rosette

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