The increased presence of carbonic acid at deep depths causes calcium carbonate to precipitate into a solid beneath approximately 4500 meters.

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The increased presence of carbon dioxide at deep depths translates into more carbonic acid. The acidity compounded with increased solubility at cold temperatures causes calcium carbonate to dissolve at faster rates than normal. This is why calcareous oozes do not form below the calcium carbonate compensation depth (about 4,500 meters). Information can be found in the section Pelagic Sediments Vary in Composition and Thickness.

The Increased Presence of Carbonic Acid at Deep Depths Causes