Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland
Abstract This study is a reconstruction of the Coniacian palaeogeographic and palaeoenvironmental development in the North Sudetic Basin, a synclinal trough within the Late Cretaceous Central European seaway linking the Boreal and Tethyan marine provinces. The basin formed as an early side effect of...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-02-01
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| Series: | The Depositional Record |
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| Online Access: | https://doi.org/10.1002/dep2.92 |
| _version_ | 1818336208251518976 |
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| author | Stanisław Leszczyński Wojciech Nemec |
| author_facet | Stanisław Leszczyński Wojciech Nemec |
| author_sort | Stanisław Leszczyński |
| collection | DOAJ |
| description | Abstract This study is a reconstruction of the Coniacian palaeogeographic and palaeoenvironmental development in the North Sudetic Basin, a synclinal trough within the Late Cretaceous Central European seaway linking the Boreal and Tethyan marine provinces. The basin formed as an early side effect of the Alpine orogeny combined with the mid‐Cretaceous eustasy, and crucial stages of its evolution occurred during the Coniacian. The basin in the early Coniacian was a long and narrow shallow‐marine embayment with a hypothetical (non‐preserved) bayhead strait funnelling tidal currents. Coalescing tidal sand ridges formed a littoral platform that prograded from the bayhead zone along the basin axis, impinged on laterally by the basin‐margin shoreface and local river deltas. A mid‐Coniacian forced marine regression and closure of the bayhead strait, attributed to the Alpine tectonism combined with eustasy, brought about a dramatic change in the basin, whereby the basin‐wide littoral sand platform emerged and turned briefly into a denudated coastal plain. The late Coniacian eustatic marine transgression formed an in‐place growing coastal sand barrier at the outer edge of the former littoral platform, sheltering a paralic limno‐lagoonal plain with peat‐forming mires. The coastal barrier was eventually drowned by the sea and maximum marine flooding occurred, followed by a normal regression recorded as a rapidly upwards‐shallowing succession of offshore‐transition to fluvio‐deltaic deposits. This case study of the sedimentation pattern in an evolving, tectonically controlled marine embayment contributes to the existing facies models for estuarine embayments formed by a passive marine drowning of large fluvial or glacial valleys. |
| first_indexed | 2024-12-13T14:35:40Z |
| format | Article |
| id | doaj.art-d9c5e9e961f14dff8c3f405a34604911 |
| institution | Directory Open Access Journal |
| issn | 2055-4877 |
| language | English |
| last_indexed | 2024-12-13T14:35:40Z |
| publishDate | 2020-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Depositional Record |
| spelling | doaj.art-d9c5e9e961f14dff8c3f405a346049112022-12-21T23:41:44ZengWileyThe Depositional Record2055-48772020-02-016114417110.1002/dep2.92Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW PolandStanisław Leszczyński0Wojciech Nemec1Institute of Geological Sciences Jagiellonian University Kraków PolandDepartment of Earth Science University of Bergen Bergen NorwayAbstract This study is a reconstruction of the Coniacian palaeogeographic and palaeoenvironmental development in the North Sudetic Basin, a synclinal trough within the Late Cretaceous Central European seaway linking the Boreal and Tethyan marine provinces. The basin formed as an early side effect of the Alpine orogeny combined with the mid‐Cretaceous eustasy, and crucial stages of its evolution occurred during the Coniacian. The basin in the early Coniacian was a long and narrow shallow‐marine embayment with a hypothetical (non‐preserved) bayhead strait funnelling tidal currents. Coalescing tidal sand ridges formed a littoral platform that prograded from the bayhead zone along the basin axis, impinged on laterally by the basin‐margin shoreface and local river deltas. A mid‐Coniacian forced marine regression and closure of the bayhead strait, attributed to the Alpine tectonism combined with eustasy, brought about a dramatic change in the basin, whereby the basin‐wide littoral sand platform emerged and turned briefly into a denudated coastal plain. The late Coniacian eustatic marine transgression formed an in‐place growing coastal sand barrier at the outer edge of the former littoral platform, sheltering a paralic limno‐lagoonal plain with peat‐forming mires. The coastal barrier was eventually drowned by the sea and maximum marine flooding occurred, followed by a normal regression recorded as a rapidly upwards‐shallowing succession of offshore‐transition to fluvio‐deltaic deposits. This case study of the sedimentation pattern in an evolving, tectonically controlled marine embayment contributes to the existing facies models for estuarine embayments formed by a passive marine drowning of large fluvial or glacial valleys.https://doi.org/10.1002/dep2.92IchnofacieslithofaciesNorth Sudetic Basinparalic plainshoal‐water deltasshoreface |
| spellingShingle | Stanisław Leszczyński Wojciech Nemec Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland The Depositional Record Ichnofacies lithofacies North Sudetic Basin paralic plain shoal‐water deltas shoreface |
| title | Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland |
| title_full | Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland |
| title_fullStr | Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland |
| title_full_unstemmed | Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland |
| title_short | Sedimentation in a synclinal shallow‐marine embayment: Coniacian of the North Sudetic Synclinorium, SW Poland |
| title_sort | sedimentation in a synclinal shallow marine embayment coniacian of the north sudetic synclinorium sw poland |
| topic | Ichnofacies lithofacies North Sudetic Basin paralic plain shoal‐water deltas shoreface |
| url | https://doi.org/10.1002/dep2.92 |
| work_keys_str_mv | AT stanisławleszczynski sedimentationinasynclinalshallowmarineembaymentconiacianofthenorthsudeticsynclinoriumswpoland AT wojciechnemec sedimentationinasynclinalshallowmarineembaymentconiacianofthenorthsudeticsynclinoriumswpoland |