Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Late Miocene megalake regressions in Eurasia

Full text
Author(s):
Palcu, Dan Valentin [1, 2] ; Patina, Irina Stanislavovna [3] ; Sandric, Ionut [4] ; Lazarev, Sergei [2] ; Vasiliev, Iuliana [5] ; Stoica, Marius [6] ; Krijgsman, Wout [2]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Oceanog Inst, Sao Paulo - Brazil
[2] Univ Utrecht, Dept Earth Sci, Paleomagnet Lab Ft Hoofddijk, Utrecht - Netherlands
[3] Russian Acad Sci, Geol Inst, Moscow - Russia
[4] Univ Bucharest, Fac Geog, Bucharest - Romania
[5] Senckenberg Biodivers & Climate Res Ctr SBiK F, Frankfurt - Germany
[6] Univ Bucharest, Dept Geol, Bucharest - Romania
Total Affiliations: 6
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 11, n. 1 JUN 1 2021.
Web of Science Citations: 0
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 similar to 1/3 of the water volume and similar to 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 km(2)) 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. (AU)

FAPESP's process: 18/20733-6 - A paleomagnetic component for a proxy of water stratification and anoxia in the sedimentary archives of oceans and epicontinental seas
Grantee:Dan Valentin Palcu
Support type: Scholarships in Brazil - Post-Doctorate