Late Miocene megalake regressions in Eurasia

Abstract The largest megalake in the geological record formed in Eurasia during the late Miocene, when the epicontinental Paratethys Sea became tectonically-trapped and disconnected from the global ocean. The megalake was characterized by several episodes of hydrological instability and partial desi...

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Autores principales:	Dan Valentin Palcu, Irina Stanislavovna Patina, Ionuț Șandric, Sergei Lazarev, Iuliana Vasiliev, Marius Stoica, Wout Krijgsman
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f0c32ac49098446fbad763a2cd2bce9c
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spelling	oai:doaj.org-article:f0c32ac49098446fbad763a2cd2bce9c2021-12-02T17:50:49ZLate Miocene megalake regressions in Eurasia10.1038/s41598-021-91001-z2045-2322https://doaj.org/article/f0c32ac49098446fbad763a2cd2bce9c2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91001-zhttps://doaj.org/toc/2045-2322Abstract The largest megalake in the geological record formed in Eurasia during the late Miocene, when the epicontinental Paratethys Sea became tectonically-trapped and disconnected from the global ocean. The megalake was characterized by several episodes of hydrological instability and partial desiccation, but the chronology, magnitude and impacts of these paleoenvironmental crises are poorly known. Our integrated stratigraphic study shows that the main desiccation episodes occurred between 9.75 and 7.65 million years ago. We identify four major regressions that correlate with aridification events, vegetation changes and faunal turnovers in large parts of Europe. Our paleogeographic reconstructions reveal that the Paratethys was profoundly transformed during regression episodes, losing ~ 1/3 of the water volume and ~ 70% of its surface during the most extreme events. The remaining water was stored in a central salt-lake and peripheral desalinated basins while vast regions (up to 1.75 million km2) became emergent land, suitable for development of forest-steppe landscapes. The partial megalake desiccations match with climate, food-web and landscape changes throughout Eurasia, although the exact triggers and mechanisms remain to be resolved.Dan Valentin PalcuIrina Stanislavovna PatinaIonuț ȘandricSergei LazarevIuliana VasilievMarius StoicaWout KrijgsmanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dan Valentin Palcu Irina Stanislavovna Patina Ionuț Șandric Sergei Lazarev Iuliana Vasiliev Marius Stoica Wout Krijgsman Late Miocene megalake regressions in Eurasia
description	Abstract The largest megalake in the geological record formed in Eurasia during the late Miocene, when the epicontinental Paratethys Sea became tectonically-trapped and disconnected from the global ocean. The megalake was characterized by several episodes of hydrological instability and partial desiccation, but the chronology, magnitude and impacts of these paleoenvironmental crises are poorly known. Our integrated stratigraphic study shows that the main desiccation episodes occurred between 9.75 and 7.65 million years ago. We identify four major regressions that correlate with aridification events, vegetation changes and faunal turnovers in large parts of Europe. Our paleogeographic reconstructions reveal that the Paratethys was profoundly transformed during regression episodes, losing ~ 1/3 of the water volume and ~ 70% of its surface during the most extreme events. The remaining water was stored in a central salt-lake and peripheral desalinated basins while vast regions (up to 1.75 million km2) became emergent land, suitable for development of forest-steppe landscapes. The partial megalake desiccations match with climate, food-web and landscape changes throughout Eurasia, although the exact triggers and mechanisms remain to be resolved.
format	article
author	Dan Valentin Palcu Irina Stanislavovna Patina Ionuț Șandric Sergei Lazarev Iuliana Vasiliev Marius Stoica Wout Krijgsman
author_facet	Dan Valentin Palcu Irina Stanislavovna Patina Ionuț Șandric Sergei Lazarev Iuliana Vasiliev Marius Stoica Wout Krijgsman
author_sort	Dan Valentin Palcu
title	Late Miocene megalake regressions in Eurasia
title_short	Late Miocene megalake regressions in Eurasia
title_full	Late Miocene megalake regressions in Eurasia
title_fullStr	Late Miocene megalake regressions in Eurasia
title_full_unstemmed	Late Miocene megalake regressions in Eurasia
title_sort	late miocene megalake regressions in eurasia
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f0c32ac49098446fbad763a2cd2bce9c
work_keys_str_mv	AT danvalentinpalcu latemiocenemegalakeregressionsineurasia AT irinastanislavovnapatina latemiocenemegalakeregressionsineurasia AT ionutsandric latemiocenemegalakeregressionsineurasia AT sergeilazarev latemiocenemegalakeregressionsineurasia AT iulianavasiliev latemiocenemegalakeregressionsineurasia AT mariusstoica latemiocenemegalakeregressionsineurasia AT woutkrijgsman latemiocenemegalakeregressionsineurasia
_version_	1718379322526400512

Late Miocene megalake regressions in Eurasia

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