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Russian Geology and Geophysics

2001 year, number 4

CARBONATE ACCUMULATION IN CONNECTION WITH THE EVOLUTION OF BIOORGANISMS IN THE PHANEROZOIC

V. G. Kuznetsov
Keywords: Carbonate rocks, evolution, bioorganisms, Phanerozoic
Pages: 560-568

Abstract

Marine and oceanic carbonate accumulation in the Vendian-Cambrian was a biochemogenic process, i.e., was caused mainly by the vital activity of organisms that formed a geochemical environment favoring carbonate sedimentation. In the early Paleozoic, this process became completely biogenic. Later on, till the end of the Paleozoic, carbonates accumulated mainly in vast shelf seas, and in the Mesozoic, in ocean shoals, reefs, and pelagic zones. In the Cenozoic, pelagic zones and, to a lesser extent, reefs became the main accumulators of carbonates. It is shown that the carbonate accumulation process depended on the atmosphere composition.