Jurassic maximum flooding surfaces in the Greater Caucasus basin (Northern Neo-Tethys)

Ruban, Dmitry A. (2008) Jurassic maximum flooding surfaces in the Greater Caucasus basin (Northern Neo-Tethys). Central European Geology, 51 (2). pp. 99-112. ISSN 1788-2281


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Abstract The Greater Caucasus evolved in the Jurassic as a large elongated back-arc basin on the northern periphery of the Neo-Tethys Ocean. The semi-quantitative analysis of proportions between marine and continental facies for each of 67 time slices produced a detailed curve depicting transgressive and regressive episodes. Five remarkable peaks on this curve are interpreted as the maximum flooding surfaces (MFSs). They are established at the Sinemurian/Pliensbachian boundary (MFS1), in the upper Pliensbachian (MFS2), the lower Aalenian (MFS3), the upper Bajocian (MFS4) and the lower Tithonian (MFS5). All surfaces except for MFS4 occur within typical MFS-marking layers. The Jurassic MFSs of the Greater Caucasus Basin do not match transgression peaks of the 1st-order cycles of Western Europe and the MFSs of Arabia. Their correspondence to the global eustatic peaks also remains uncertain. The most unexpected event is found in MFS3, which occurs at a time of prominent global sea-level fall. Errors in constraints and interpretations as well as influences of regional tectonic activity explain a specificity of the regional MFSs. The use of the regional Jurassic MFSs from the Greater Caucasus Basin for correlation purposes, therefore, appears doubtful.

Item Type: Article
Subjects: Q Science / természettudomány > QE Geology / földtudományok
Depositing User: xBarbara xBodnár
Date Deposited: 15 Jun 2017 15:23
Last Modified: 04 Apr 2023 12:53

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