This work discusses the significance of particular types of soft-sediment deformations very common within turbidite deposits, namely convolute laminations and load structures. Detailed facies analyses of the foredeep turbidites in theMarnoso-arenacea Formation (northern Italy) and Annot Sandstones (south eastern France) showthat these deformational structures tend to increase near morphological obstacles, concomitantlywith contained-reflected beds. The lateral and vertical distribution of convolute laminae and load structures, as well as their geometry, has a well-defined depositional logic related to flow decelerations and reflections against bounding slopes. This evidence suggests an interaction between fine-grained sediment and the presence of morphologic relief, and impulsive and cyclic-wave loadings,which are produced by flowimpacts or reflected bores and internal waves related to impinging bipartite turbidity currents.

Convolute laminations and load structures in turbidites as indicators of flow reflections and decelerations against bounding slopes. Examples from the Marnoso-arenacea Formation (northern Italy) and Annot Sandstones (south eastern France) / Tinterri, Roberto; Muzzi Magalhaes, P.; Tagliaferri, A.; Cunha, R. S.. - In: SEDIMENTARY GEOLOGY. - ISSN 0037-0738. - 344:(2016), pp. 382-407. [10.1016/j.sedgeo.2016.01.023]

Convolute laminations and load structures in turbidites as indicators of flow reflections and decelerations against bounding slopes. Examples from the Marnoso-arenacea Formation (northern Italy) and Annot Sandstones (south eastern France)

TINTERRI, Roberto;
2016

Abstract

This work discusses the significance of particular types of soft-sediment deformations very common within turbidite deposits, namely convolute laminations and load structures. Detailed facies analyses of the foredeep turbidites in theMarnoso-arenacea Formation (northern Italy) and Annot Sandstones (south eastern France) showthat these deformational structures tend to increase near morphological obstacles, concomitantlywith contained-reflected beds. The lateral and vertical distribution of convolute laminae and load structures, as well as their geometry, has a well-defined depositional logic related to flow decelerations and reflections against bounding slopes. This evidence suggests an interaction between fine-grained sediment and the presence of morphologic relief, and impulsive and cyclic-wave loadings,which are produced by flowimpacts or reflected bores and internal waves related to impinging bipartite turbidity currents.
Convolute laminations and load structures in turbidites as indicators of flow reflections and decelerations against bounding slopes. Examples from the Marnoso-arenacea Formation (northern Italy) and Annot Sandstones (south eastern France) / Tinterri, Roberto; Muzzi Magalhaes, P.; Tagliaferri, A.; Cunha, R. S.. - In: SEDIMENTARY GEOLOGY. - ISSN 0037-0738. - 344:(2016), pp. 382-407. [10.1016/j.sedgeo.2016.01.023]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2826301
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