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The fungi, cyanobacteria, and lichens on and within the siliceous rocks in harsh environments quickly dissolve silica by releasing Carboxylic acids. In this regard 2-ketogluconic acid, citric and oxalic acids are mainly associated with the dissolution of siliceous rocks. Solubilization of siliceous rocks by chelating action of the said organic acids results in rock weathering and soil formation.

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