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Supercritical and subcritical turbidity currents and their deposits - a synthesis

Postma, G.; Cartigny, M.J.B.. 2014 Supercritical and subcritical turbidity currents and their deposits - a synthesis. Geology, 42 (11). 987-990. 10.1130/G35957.1

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Abstract/Summary

Common facies models of turbidite deposits are based on idealized sequences of turbidite units, which are assumed to reflect the depositional processes of a decelerating turbidity current. We show how suites of turbidite units, i.e., distinct turbidite facies associations that are easily described from core and outcrop, may characterize the entire range of large-scale dynamics of turbidity currents, enabling estimates of their densimetric Froude number (Fr; subcritical versus supercritical) and suspension fall-out rate (stratified versus nonstratified flows). The linking of facies associations with large-scale flow dynamics resolves process-facies links that were hitherto unresolved by the common turbidite facies models.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1130/G35957.1
ISSN: 0091-7613
Date made live: 11 Nov 2014 16:24 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/508793

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