The interpretative significance of ripple-derived sedimentary structures within an upper Neogene fluvial succession of central Poland
Loading...
Date
2019-04
Advisor
Editor
Journal Title
Journal ISSN
Volume Title
Publisher
Wydawnictwo Naukowe UAM
Title alternative
Abstract
Sedimentary structures discussed in the present study are genetically linked to ripples that consist of pure sand or al-
ternating sand and mud layers. All types of ripple-related structures, such as climbing-ripple cross-lamination and het-
erolithic 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 rip-
ple-derived sedimentary structures are here recognised as typical of channel fills of an anastomosing river.
Description
Sponsor
Keywords
sedimentology, depositional structures, ripples, anastomosing river
Citation
Geologos, 2019, 25, 1, 1-13.
ISBN
978-83-232187-4-6