Opal-hued pools of carbon dioxide-rich water have been found in the caldera of the Santorini volcano, deep beneath the surface of the Aegean Sea. The opal color may come from the glassy microscopic bodies of silica-based organisms.
Opal-hued pools of carbon dioxide-rich water have been found in the caldera of the Santorini volcano, deep beneath the surface of the Aegean Sea. The opal color may come from the glassy microscopic bodies of silica-based organisms.
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