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Condensed sections: Terminology, types, and accumulation conditions

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Abstract

Condensed sections (CS) are abnormally thin but nominally complete sections embracing large stratigraphic intervals. They are subdivided with regard to sedimentation rate into CS (at sedimentation rate of 0.5–1 cm/ka) and ultracondensed sections (with a sedimentation rate <0.5 cm/ka), which can be both deep-water and shallow-water types. The mechanisms of CS accumulation include mechanical, chemical, biotic condensation, and nondeposition. Their combinations allow one to suggest some models of CS accumulation: (1) fast and (2) slow sea level rise and/or its low-amplitude fluctuations; (3) sea level drop; (4) global warming and (5) global cooling.

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Authors and Affiliations

  1. Department of Regional Geology and the Earth Evolution, Faculty of Geology, Moscow State University, Moscow, 119991, Russia

    E. Yu. Baraboshkin

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  1. E. Yu. Baraboshkin
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Correspondence to E. Yu. Baraboshkin.

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Original Russian Text © E.Yu. Baraboshkin, 2009, published in Vestnik Moskovskogo Universiteta. Geologiya, 2009, No. 3, pp. 13–20.

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Baraboshkin, E.Y. Condensed sections: Terminology, types, and accumulation conditions. Moscow Univ. Geol. Bull. 64, 153–160 (2009). https://doi.org/10.3103/S0145875209030028

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  • DOI: https://doi.org/10.3103/S0145875209030028

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