New evidence of the age of the lower Maeotian substage of the Eastern Paratethys based on astronomical cycles

Rybkina, Alena; Kern, Andrea; Rostovtseva, Yuliana V.

doi:10.1016/j.sedgeo.2015.10.003

Cited by 18 publications

(13 citation statements)

References 16 publications

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“…Correlating downwards result in two different age options for the Khersonian/Maeotian boundary: the polarity pattern of Zheleznyi Rog suggests a location in C3Br.1r at an age of 7.25 Ma; the pattern in Popov Kamen best fits to C3Br.3r at an age of 7.5 Ma (assuming that the short subchron C3Br.1n has been missed in the section; Filippova & Trubikhin, ). A cyclostratigraphic study, based on magnetic susceptibility patterns in the Popov Kamen section, revealed a 41,000‐year obliquity cycle and suggested an age of ~7.6 Ma for the Khersonian/Maeotian boundary (Rybkina, Kern, & Rostovtseva, ).…”

Section: Towards a Revised Late Miocene Age Model For The Eastern Parmentioning

confidence: 99%

The end of the Great Khersonian Drying of Eurasia: Magnetostratigraphic dating of the Maeotian transgression in the Eastern Paratethys

et al. 2018

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Central Eurasia underwent significant palaeoclimatic and palaeogeographic transformations during the middle to late Miocene. The open marine ecosystems of the Langhian and Serravallian seas progressively collapsed and were replaced in the Tortonian by large endorheic lakes. These lakes experienced major fluctuations in water level, directly reflecting the palaeoclimatic conditions of the region. An extreme lowstand of the Eastern Paratethys lake (−300 m) during the regional Khersonian stage reveals a period of intensely dry conditions in Central Eurasia causing a fragmentation of the Paratethys region. This period of “Great Drying” ended by a climate change towards more humid conditions at the base of the Maeotian stage, resulting in a large transgressive event that reconnected most of the Paratethyan basins. The absence of a robust time frame for the Khersonian–Maeotian interval hampers a direct correlation with the global records and complicates a thorough understanding of the underlying mechanisms. Here we present a new chronostratigraphic framework for the Khersonian and Maeotian deposits of the Dacian Basin of Romania, based on integrated magneto‐biostratigraphic studies on long and continuous sedimentary successions. We show the dry climate conditions in the Khersonian start at 8.6–8.4 Ma. The Khersonian/Maeotian transition is dated at 7.65–7.5 Ma, several million years younger than previous estimates. The Maeotian transgression occurs later (7.5–7.4 Ma) in more marginal and shallower basins, in agreement with the time transgressive character of the flooding. In addition, we date a sudden water level drop of the Eastern Paratethys lake, the Intra‐Maeotian Event (IME), at 6.9 Ma, and hypothesize that this corresponds to a reconnection phase with the Aegean basin of the Mediterranean. Finally, we discuss the potential mechanisms explaining the particularities of the Maeotian transgression and conclude that the low salinity and the seemingly “marine influxes” most likely correspond to episodes of intrabasinal mixing in a gradual and pulsating transgressive setting.

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Section: Towards a Revised Late Miocene Age Model For The Eastern Parmentioning

confidence: 99%

The end of the Great Khersonian Drying of Eurasia: Magnetostratigraphic dating of the Maeotian transgression in the Eastern Paratethys

et al. 2018

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“…Chapter 1 provides significant refinement of the late Miocene stratigraphy of the Dacian Basin bringing it in line with the other Paratethyan basins. The Khersonian-Maeotian boundary has been dated at 7.63 Ma, which is in a good agreement with the 7.6 Ma age in the Black Sea (Rybkina et al, 2015) and 7.65 Ma in the other parts of the Dacian Basin (Palcu et al, 2019b). The Maeotian-Pontian boundary is now firmly established at 6.1 Ma that is synchronous with the records of the Black (Rostovtseva and Rybkina, 2017) and Caspian Seas (van Baak et al, 2016).…”

Section: Part 1 -Ending Of the Main Endorheic Phase In The Eastern Pasupporting

confidence: 75%

“…• Pontian "flooding" of the Eastern Paratethys characterised by the occurrence of marine groups and brackish water communities from the Central Paratethys (Lake Pannon) at 6.1 Ma (Rybkina et al, 2015;van Baak et al, 2016;Lazarev et al, 2019 (submitted)).…”

Section: IImentioning

confidence: 99%

“…(Iljina et al, 1976;Kojumdgieva et al, 1989;Paramonova, 1994). In the Black Sea (Euxinian Basin), the Khersonian-Maeotian boundary has been dated magnetostratigraphically (Trubikhin, 1989;Radionova et al, 2012) and cyclostratigraphically (Rybkina et al, 2015) at ~7.6 Ma (correlation to C4n.1n) and in the Dacian Basin (correlation to C4n.1r -C3Br.2r chrons) it was recently dated at 7.65 Ma (Palcu et al, 2019b).…”

Section: 22mentioning

confidence: 99%

“…The age of the Khersonian-Maeotian boundary has been highly debated, with attributed ages differing as much as 3 Myr: 10.5 Ma (Matenco et al, 2003), 9.3 Ma (Nevesskaya et al, 2003), 7.6 Ma (Rybkina et al, 2015;Palcu et al, 2019b). In the Black Sea, the Khersonian- Maeotian boundary was magneto-and cyclostratigraphically dated at 7.6 Ma (Trubikhin, 1989;Rybkina et al, 2015;Rostovtseva and Rybkina, 2017). In the Dacian Basin, initiation of the Maeotian transgression was dated at 7.65 Ma (slightly below C4n.1n -C4n.1r polarity reversal) (Palcu et al, 2019b).…”

Section: Magneto-biostratigraphic Correlation To Gptsmentioning

confidence: 99%

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From the Eastern Paratethys to the Pontocaspian basins

Lazarev¹

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Image of a dust storm over the Aral Sea in 2005. Nowadays, the right branch of the sea is completely gone. Image credit: Jeff Schmaltz, NASA's Visible Earth catalogue. Paratethys The Paratethys was an ancient, vast Eurasian sea that once extended from the Alps on the West to western China on the East (Laskarev, 1924; Rögl, 1999; Schulz et al., 2005). Nowadays, small remnants of this sea in the form of the Black and Caspian seas are left. The large-scale evolution of the Paratethys, from its birth until now, was actively controlled by the tectonic collision of the African, Eurasian and Arabian plates, including further several microplates. Around the Oligocene-Eocene transition (~35 Ma), ongoing plate collision separated the Paratethys from the Mediterranean Sea (Schulz et al., 2005). Subsequent evolution of the Paratethys was driven by a prograding collision that resulted in the formation of the Caucasus, Alps, Carpathians and several other mountain ranges. Initially, the Paratethys comprised a Western, Central and Eastern domain. The short-lived and small Western Paratethys formed in the Alpine foreland basin and became isolated at the end of the early Miocene

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