<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

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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

Published Online: Jun 13, 2019

Page range: 1 - 13

Received: Aug 27, 2018

Accepted: Nov 28, 2018

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

Keywords
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

Published Online: Jun 13, 2019

Page range: 1 - 13

Received: Aug 27, 2018

Accepted: Nov 28, 2018

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

Keywordssedimentology, 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.

Keywords
sedimentology, depositional structures, ripples, anastomosing river