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Calcare a coralli: Calcare di ZU - lablog

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Selci<br />

Massi erratici provenienti dalla Valtellina e dalla Valchiavenna, trasportati dai ghiacciai durante le fasi glaciali PleistoRocce<br />

se<strong>di</strong>mentarie silicee dure e compatte, <strong>di</strong> aspetto vetroso e <strong>di</strong> colore vario (marrone, nero o rosso), <strong>di</strong> origine organogena,<br />

costituite dai resti dell’involucro esterno siliceo <strong>di</strong> Protozoi (Ra<strong>di</strong>olari) Spugne e Alghe (Diatomee).

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