<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Sedimentary structures discussed in the present study are genetically linked to ripples that consist of pure sand or alternating sand and mud layers. All types of ripple-related structures, such as climbing-ripple cross-lamination and heterolithic bedding, i.e., flaser, wavy and lenticular (nodular), have been identified for the first time in fluvial strata that have been characterised previously as commonly massive. These small-scale bedforms, produced by migrating ripples, have been documented in a fluvial channel of late Neogene age in central Poland. The abundance and co-occurrence of the structures discussed and their spatial distribution provide evidence of their formation under very low-energy conditions, when flow velocity changed markedly, but was often significantly less than 0.5 m/s. Therefore, these ripple-derived sedimentary structures are here recognised as typical of channel fills of an anastomosing river.</p></abstract>

Sedimentary structures discussed in the present study are genetically linked to ripples that consist of pure sand or alternating sand and mud layers. All types of ripple-related structures, such as climbing-ripple cross-lamination and heterolithic bedding, i.e., flaser, wavy and lenticular (nodular), have been identified for the first time in fluvial strata that have been characterised previously as commonly massive. These small-scale bedforms, produced by migrating ripples, have been documented in a fluvial channel of late Neogene age in central Poland. The abundance and co-occurrence of the structures discussed and their spatial distribution provide evidence of their formation under very low-energy conditions, when flow velocity changed markedly, but was often significantly less than 0.5 m/s. Therefore, these ripple-derived sedimentary structures are here recognised as typical of channel fills of an anastomosing river.

The interpretative significance of ripple-derived sedimentary structures within an upper Neogene fluvial succession of central Poland

Geologos

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Sedimentary structures discussed in the present study are genetically linked to ripples that consist of pure sand or alternating sand and mud layers. All types...

The interpretative significance of ripple-derived sedimentary structures within an upper Neogene fluvial succession of central Poland

Publié en ligne: 13 juin 2019

Pages: 1 - 13

Reçu: 27 août 2018

Accepté: 28 nov. 2018

DOI: https://doi.org/10.2478/logos-2019-0001

Mots clés
sedimentology, depositional structures, ripples, anastomosing river

© 2019 Piotr Maciaszek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The interpretative significance of ripple-derived sedimentary structures within an upper Neogene fluvial succession of central Poland

Publié en ligne: 13 juin 2019

Pages: 1 - 13

Reçu: 27 août 2018

Accepté: 28 nov. 2018

DOI: https://doi.org/10.2478/logos-2019-0001

Mots cléssedimentology, depositional structures, ripples, anastomosing river

© 2019 Piotr Maciaszek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
sedimentology, depositional structures, ripples, anastomosing river