A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP)
The present paper synthesizes the evolution of fluvial systems tributary to the Black Sea (within 25 – 8 ka BP time frame) by reviewing the existing paleoclimate, hydro-geomorphology, sedimentology and Late Quaternary chronology. These studies are unevenly distributed throughout the Black Sea (BS) d...
Main Author: | |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English French |
Published: |
Romanian Association of Geomorphologists
2021
|
Subjects: | |
Online Access: | https://doi.org/10.21094/rg.2021.141 https://doaj.org/article/a953afcea2bb47518ca83f30279db028 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:a953afcea2bb47518ca83f30279db028 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:a953afcea2bb47518ca83f30279db028 2023-05-15T16:38:23+02:00 A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) Maria Radoane 2021-12-01 https://doi.org/10.21094/rg.2021.141 https://doaj.org/article/a953afcea2bb47518ca83f30279db028 en fr eng fre Romanian Association of Geomorphologists doi:10.21094/rg.2021.141 1453-5068 2285-6773 https://doaj.org/article/a953afcea2bb47518ca83f30279db028 undefined Revista de Geomorfologie, Vol 23, Iss 1 (2021) fluvial style reconstruction paleo-hydrological changes base level oscillation Black Sea drainage basin Late Pleniglacial Late Glacial geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.21094/rg.2021.141 2023-01-22T19:28:53Z The present paper synthesizes the evolution of fluvial systems tributary to the Black Sea (within 25 – 8 ka BP time frame) by reviewing the existing paleoclimate, hydro-geomorphology, sedimentology and Late Quaternary chronology. These studies are unevenly distributed throughout the Black Sea (BS) drainage basin and were used to decipher the river response to climatic, eustatic, tectonically induced or vegetation cover changes. The river response was sensitive overall and is visible particularly in terms of the channel planform. The alternation of cold and warm climate phases has controlled to a significant degree the water and sediment inputs along the drainage networks, such that river channels planforms shifted from the braided type to the anastomosed type (with various transitional phases, either wandering or anastomosed), and from macro-meanders to small scale meanders. The climatic model of fluvial evolution was altered by the other controlling factors specific to the large BS drainage basin, including tectonics (in the Pannonian Plain, Western Plain of Romania, Lower Siret Plain), the proximity to coarse-grained sediment sources (typical for medium-sized Carpathian tributaries), the obstruction exerted by glacial sediments generated by the ice cap retreat (as illustrated on the Upper Dnieper), eustatic oscillations (detected on the Danube or Sakarya River). The sea level drop by more than 100 m during the Last Glacial Maximum resulted in the conversion of ca. 30% of the present sea surface to dry land (mostly on the NW continental shelf); several sinuous-anastomosed paleo-channels pertaining to major rivers (Danube, Dniester, Dnieper) with depths ranging between 30 and 90 m were reconstructed on the surface of this emerged land. Black Sea became connected to the Planetary Ocean during the Early Holocene (ca. 9.4 ka BP). The sea waters flooded extensive areas at the NW and advanced upstream along tributary river valleys. The effects of base level rise were reflected in the anastomosed style of river ... Article in Journal/Newspaper Ice cap Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English French |
topic |
fluvial style reconstruction paleo-hydrological changes base level oscillation Black Sea drainage basin Late Pleniglacial Late Glacial geo envir |
spellingShingle |
fluvial style reconstruction paleo-hydrological changes base level oscillation Black Sea drainage basin Late Pleniglacial Late Glacial geo envir Maria Radoane A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) |
topic_facet |
fluvial style reconstruction paleo-hydrological changes base level oscillation Black Sea drainage basin Late Pleniglacial Late Glacial geo envir |
description |
The present paper synthesizes the evolution of fluvial systems tributary to the Black Sea (within 25 – 8 ka BP time frame) by reviewing the existing paleoclimate, hydro-geomorphology, sedimentology and Late Quaternary chronology. These studies are unevenly distributed throughout the Black Sea (BS) drainage basin and were used to decipher the river response to climatic, eustatic, tectonically induced or vegetation cover changes. The river response was sensitive overall and is visible particularly in terms of the channel planform. The alternation of cold and warm climate phases has controlled to a significant degree the water and sediment inputs along the drainage networks, such that river channels planforms shifted from the braided type to the anastomosed type (with various transitional phases, either wandering or anastomosed), and from macro-meanders to small scale meanders. The climatic model of fluvial evolution was altered by the other controlling factors specific to the large BS drainage basin, including tectonics (in the Pannonian Plain, Western Plain of Romania, Lower Siret Plain), the proximity to coarse-grained sediment sources (typical for medium-sized Carpathian tributaries), the obstruction exerted by glacial sediments generated by the ice cap retreat (as illustrated on the Upper Dnieper), eustatic oscillations (detected on the Danube or Sakarya River). The sea level drop by more than 100 m during the Last Glacial Maximum resulted in the conversion of ca. 30% of the present sea surface to dry land (mostly on the NW continental shelf); several sinuous-anastomosed paleo-channels pertaining to major rivers (Danube, Dniester, Dnieper) with depths ranging between 30 and 90 m were reconstructed on the surface of this emerged land. Black Sea became connected to the Planetary Ocean during the Early Holocene (ca. 9.4 ka BP). The sea waters flooded extensive areas at the NW and advanced upstream along tributary river valleys. The effects of base level rise were reflected in the anastomosed style of river ... |
format |
Article in Journal/Newspaper |
author |
Maria Radoane |
author_facet |
Maria Radoane |
author_sort |
Maria Radoane |
title |
A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) |
title_short |
A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) |
title_full |
A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) |
title_fullStr |
A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) |
title_full_unstemmed |
A history of the circum-pontic river channels marked by climate and sea level changes during the Late Quaternary (25-8 ka BP) |
title_sort |
history of the circum-pontic river channels marked by climate and sea level changes during the late quaternary (25-8 ka bp) |
publisher |
Romanian Association of Geomorphologists |
publishDate |
2021 |
url |
https://doi.org/10.21094/rg.2021.141 https://doaj.org/article/a953afcea2bb47518ca83f30279db028 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Revista de Geomorfologie, Vol 23, Iss 1 (2021) |
op_relation |
doi:10.21094/rg.2021.141 1453-5068 2285-6773 https://doaj.org/article/a953afcea2bb47518ca83f30279db028 |
op_rights |
undefined |
op_doi |
https://doi.org/10.21094/rg.2021.141 |
_version_ |
1766028656319135744 |