Kinematic history of the opening of the Black Sea and its effect on the surrounding regions

Okay, Aral I.; Şengör, A. M. Celâl; Görür, Nací

doi:10.1130/0091-7613(1994)022<0267:khotoo>2.3.co;2

Cited by 392 publications

(297 citation statements)

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“…The puzzling position of the North Dobrogean Triassic in the foreland of the Alpine Carpathian Orogen can be interpreted as a result of post-Triassic large-scale horizontal displacements of Tethyan terranes in close connection with the opening of the West Black Sea Basin (e.g. Grădinaru 1988;Okay et al 1994;Banks and Robinson, 1997).…”

Section: Geologic and Stratigraphic Settingmentioning

confidence: 99%

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Popa¹,

Panaiotu²,

Grădinaru³

2014

Acta Geologica Polonica

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ABSTRACT:Popa, L., Panaiotu, C.E. and Grădinaru, E. 2014. An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis. Acta Geologica Polonica, 64 (2), 189-206. Warszawa.A well-developed Triassic carbonate platform is exposed in the eastern part of the Tulcea Unit, in the Cimmerian North Dobrogean Orogen, southeastern Romania. Facies analysis of the 200 m thick succession of lower Middle Anisian limestones exposed in a large limestone quarry south of the village of Mahmudia suggests a transition from upper slope towards toe-of-slope carbonate facies, reflecting sea-level fluctuations and tectonic tilting. The slope is dominated by in situ microbialites in the upper portion, consisting of reefal boundstone facies, and by molluscan coquina and cement boundstones. A key role is played by the cosmopolitan micro-encruster Tubiphytes, which became common in the aftermath of the mass extinction at the Permian/Triassic boundary, and by autochthonous micrite and synsedimentary marine cement. The absence of metazoan reef builders, such as sponges and corals, reflects the fact that microbes were the first organisms to recover after the Permian/Triassic crisis under unusual marine conditions and that their main role in reef formation was sediment stabilization along the upper slopes. The lower slope is mostly detrital, being dominated by platform-derived bioclastic rudstones and crinoidal floatstones, which are interbedded with basinal carbonate hemipelagics. The toe-of-slope is composed of pelagic wackestones framed by thin tongues of intraclast breccia. All these observations are in agreement with the slopeshedding model described for the Pennsylvanian microbial margin in Asturias (northern Spain) and the AnisianLadinian flat-topped, steep-rimmed Latemar platform (Dolomites, Italy).As most of the Anisian reefs were described from western and eastern Tethys (Southern Alps, Hungary, China), the occurrence of the early Middle Anisian Tubiphytes-reef from North Dobrogea (Romania) contributes to resolving the puzzle of the geographic distribution of reef recovery in the Middle Triassic.

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Section: Geologic and Stratigraphic Settingmentioning

confidence: 99%

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Popa¹,

Panaiotu²,

Grădinaru³

2014

Acta Geologica Polonica

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“…This particular area in the Western Pontides belongs to the so-called Rhodope-Pontide fragment of engör & Yôlmaz (1981), to the Istanbul Zone of Okay (1989) or to the Istanbul and Zonguldak Terranes of Göncüoglu et al (1997). Okay et al (1994) have suggested, that this continental sliver was originally located further north between the Moesian platform and Crimea as part of the Odessa shelf prior to the Albian. During the opening of the Western Black Sea basin during the Albian to Early Eocene it drifted southward along two major transform faults (Fig.…”

Section: Devonian Of the Pontidesmentioning

confidence: 99%

Devonian in Turkey — a review

Yalçın¹,

Yılmaz²

2010

Geologica Carpathica

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Abstract:The Devonian Period is represented in Turkey by almost complete non-metamorphic sections of more than 1000 meters, which exhibit varying lithofacial associations. They are parts of thick Paleozoic sedimentary successions in the Pontides, Taurides and Arabian Plate. The tectonic setting and the paleogeographical origin of these terranes is different. Therefore, the litho-and biostratigraphy and facies characteristics of these Devonian successions would enable a comparison and a paleogeographical assignment of these tectono-stratigraphic units. Devonian successions of the Arabian Plate and of the Taurides are represented by facies associations ranging from tidal flat to a deep shelf. Whereas, those of the Istanbul and Çamdag-Zonguldak areas in the Pontides by a deepening upward sequence from a shallow shelf into a basin and a stable shelf, respectively. The Devonian of the Arabian Plate and the Taurides can surely be assigned to Gondwana. A Peri-Gondwanan (Avalonian) setting is suggested for the paleogeographic position of the Devonian of the Pontides.

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“…Based on his regional studies and a thorough knowledge of geological literature, Aral Okay and his colleagues including Celal Şengör, Okan Tüysüz and Naci Görür, published a series of highly cited synthesis papers on the geological structure and evolution of Turkey with the main emphasis on the Pontides (Okay, 1989b;Okay, 2000Okay, , 2008Okay, Satır, & Siebel, 2006;Okay, Şengör, & Görür, 1994;Okay, Tansel, & Tüysüz, 2001;Okay & Tüysüz, 1999). The widely used subdivision of the Pontides into the İstanbul, Sakarya and Strandja zones dates back to his publication in 1989 (Okay, 1989b).…”

Section: Prefacementioning

confidence: 99%

Preface

Bozkurt

2012

Geodinamica Acta

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Kinematic history of the opening of the Black Sea and its effect on the surrounding regions

Cited by 392 publications

References 0 publications

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

An early Middle Anisian (Middle Triassic) Tubiphytes and cement crusts-dominated reef from North Dobrogea (Romania): facies, depositional environment and diagenesis

Devonian in Turkey — a review

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