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Openai/690a67b9-9920-8005-b600-c33a3a13fdc5
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===== Etwa 99,9 % des gesamten irdischen Kohlenstoffs ist tatsächlich in Gesteinen gebunden, vor allem als ===== Calciumcarbonat (CaCO₃) – also Kalkstein, Dolomit oder Kreide. Das ist ein lithosphärischer Speicher, entstanden durch: * Ausfällung von Carbonaten im Meer (chemisch oder biologisch) * Ablagerung von Schalen, Korallen, Foraminiferen etc. * Diagenese und Gesteinsbildung über geologische Zeiträume → Dieser Prozess bindet Kohlenstoff dauerhaft über Millionen Jahre. → Das ist also eine Art endgültige Senke – kein kurzfristiger Kreislauf wie in der Biosphäre.
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