Transitional flow deposits on submarine lobe flank (Veřovice and Lhoty Fms, Albian – Cenomanian, Polish Outer Carpathians)

Łapcik, Piotr

doi:10.1016/j.sedgeo.2023.106329

Cited by 3 publications

(2 citation statements)

References 81 publications

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“…Interpretation:A facies of this type implies internal flow pulses with a depositional mode occurring between two end members, i.e., turbidity current and debris flow (cf. Lowe and Guy, 2000;Lowe et al, 2003;Baas et al, 2009;Haughton et al, 2009;Stevenson et al, 2020;Łapcik, 2023). Turbulent flow is represented by tractional deposition and the appearance of ripple and planar-parallel lamination.…”

Section: Facies F3: Banded Sandstonementioning

confidence: 99%

Evolution of a turbidite system in a narrow basin setting: the Ropianka Fm (Campanian–Paleocene) in the Skole Nappe of the Polish Carpathians

Łapcik

2024

ASGP

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Facies analysis plays an important role in basin analysis and serves as a tool to track the evolution of fossil depositional environments. This also applies to the deep-water setting, where turbidite systems represent an ultimate sink for the vast majority of sedimentary materials on Earth, including anthropogenic pollutants (e.g., Martin et al., 2022). The consequence of the capturing and burial of these deposits has also a great influence on carbon sequestration and climate (e.g., Arthur et al., 1988). Our understanding of the architecture and evolution of deep-water systems is constantly growing and models for facies prediction are now better than ever. However, the multiplicity of factors, which strongly influence turbidite systems (e.g., nature of the source, tectonic setting, eustatic sea-level changes, climate), leads to a wide variety of ancient records and proposed models that describe them (e.g.

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Section: Facies F3: Banded Sandstonementioning

confidence: 99%

Evolution of a turbidite system in a narrow basin setting: the Ropianka Fm (Campanian–Paleocene) in the Skole Nappe of the Polish Carpathians

Łapcik

2024

ASGP

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“…Such structures were likely formed within, or at the boundaries of, the upper stage plane bed regime via tractional reworking beneath mud‐rich transitional flows (Stevenson et al ., 2020). In the ancient rock record, bedforms attributed to cohesive, transitional flows have been documented in lobe fringe and distal lobe fringe environments (Baker & Baas, 2020; Privat et al ., 2021; Baas et al ., 2021b; Łapcik, 2023), channel‐lobe transition zones (Brooks et al ., 2022) and lacustrine environments (Dou et al ., 2021; Baas et al ., 2021a). In contrast, the texture, geometry and spatio‐temporal distribution of mixed grain‐size bedforms have not been documented in proximal locations, such as submarine slope successions.…”

Section: Introductionmentioning

confidence: 99%

Unidirectional and combined transitional flow bedforms: Controls on process and distribution in submarine slope settings

Taylor,

Hodgson,

Peakall

et al. 2024

Sedimentology

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Mixed grain‐size bedforms comprise alternating sand‐rich and poorly sorted mud‐rich laminae and bands. These bedforms have been identified in distal submarine settings formed underneath unidirectional flows. This study documents mixed grain‐size bedforms in a proximal submarine slope setting formed beneath both unidirectional and combined flows. Core and outcrop data with well‐constrained palaeogeographical context are used to describe two types of mixed grain‐size bedform. Type A bedforms comprise mud‐rich current ripples and low‐amplitude bed‐waves with alternating concave and planar sandstone–mudstone foresets that pass into mud‐rich troughs, and aggradational sinusoidal laminasets. Type B bedforms consist of sandstone–mudstone laminasets that comprise rounded, biconvex ripples with sigmoidal‐shaped foresets and swale and hummock‐like laminasets and banded sets. These bedforms occur in channel‐margin, internal‐levée and external‐levée, intraslope and disconnected lobe environments, and represent 27 to 63% by stratigraphic thickness of the studied successions. They are interpreted as deposits of clay‐rich transitional flows, whose depositional style is governed by the balance of cohesive and turbulent forces, and the rate of flow deceleration. Type B bedforms are further interpreted as combined transitional flow deposits, resulting from flow deflection and ponding processes by seabed topography. Upward and lateral transitions between different bedforms create distinct bedform sequences, demonstrating progressive spatio‐temporal transformations in flow properties and their topographic interactions. By using a well‐constrained palaeogeographical setting, mixed grain‐size bedforms are shown to be situated close to sites of erosion into muddy substrates, abrupt losses in confinement, and/or changes in slope gradient. These bedforms demonstrate that flow transformation and transitional flow behaviour are not restricted to distal submarine settings. Furthermore, mixed grain‐size bedforms are not a diagnostic criterion for bottom currents, because such flows cannot account for the high mud content in laminasets, or the interlamination of sand and mud.

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Sediment bypass in a marl-dominated margin of a turbidite system in a narrow basin setting

Łapcik

2024

Sedimentary Geology

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Transitional flow deposits on submarine lobe flank (Veřovice and Lhoty Fms, Albian – Cenomanian, Polish Outer Carpathians)

Cited by 3 publications

References 81 publications

Evolution of a turbidite system in a narrow basin setting: the Ropianka Fm (Campanian–Paleocene) in the Skole Nappe of the Polish Carpathians

Evolution of a turbidite system in a narrow basin setting: the Ropianka Fm (Campanian–Paleocene) in the Skole Nappe of the Polish Carpathians

Unidirectional and combined transitional flow bedforms: Controls on process and distribution in submarine slope settings

Sediment bypass in a marl-dominated margin of a turbidite system in a narrow basin setting

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