Late Eocene to Early Oligocene palynostratigraphy of the Western Black Sea, Eastern Paratethys

Sancay, Recep Hayrettin; Bati, Zuhtu

doi:10.3906/yer-1905-10

Cited by 4 publications

(1 citation statement)

References 49 publications

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“…Fungal spores and hyphae are generally common to very common. The overall dinocyst assemblages indicate an Early Oligocene age (see also Sancay and Batı, 2020). Occurrences of rare specimens of Wetzeliella symmetrica (samples 26, 30, 36, and 54) indicate an Early Oligocene age, and specimens of Charlesdowniea clathrata (samples 19 and 68) indicate an age within the Early Oligocene to Late Eocene.…”

Section: Palynologymentioning

confidence: 91%

Biostratigraphy and paleoenvironments of the Oligocene succession(İhsaniye Formation) at Karaburun (NW Turkey)

Simmons¹,

Bidgood²,

Connell³

et al. 2020

Turkish J Earth Sci

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The biostratigraphy and paleoenvironments of the İhsaniye Formation exposed at Karaburun in northwest Turkey is described based upon the study of abundant and well-preserved foraminifera, calcareous nannofossils and palynomorphs. The studied succession is Early Oligocene in age, with calcareous nannofossil zones upper NP21 (Subzone CNO1) to lower NP23 (Subzone CNO3) and planktonic foraminifera zones O1 (~P18) and O2 (~P19) represented, and palynological assemblages suggestive of zones D13 to D14a. Based on these new data, a revised interpretation of the stratigraphic succession is presented. Deposition was controlled by a now inverted normal fault, with deposition of older stratigraphy (upper NP21 to NP22) restricted to the original hanging wall. During NP23, deposition commenced on the footwall, resulting in progressive onlap of an exposed Eocene reefal limestone (Soğucak Formation). Three primary sedimentary facies are present: marls with thin calcareous siltstones, marls with synsedimentary slumps and debris flows, and coarse pebbly sandstones. The coarse pebbly sandstones were deposited in a fan-delta/shoreface paleoenvironment and represent the initial phase of onlap during biozone NP23 onto a rocky shoreline on the footwall side of the fault. The marl-dominated facies represent deposition in outer shelf-upper bathyal environments. The succession demonstrates evidence for a near-end Eocene relative sea-level fall. Changes in the abundance of planktonic foraminifera and the onlap onto the footwall demonstrate maximum subsequent transgression within NP23. This reflects eustasy rather than Paratethyan relative sea-level. No interpretation of sea-water salinity reduction can be made for the sediments deposited during biozone NP23 in the studied sections, although this is noted in coeval sediments in parts of Paratethys (the "Solenovian Event"). Together with the open marine nature of the diverse and abundant fossil assemblages, it is suggested that deposition of the Karaburun section was strongly influenced by a connection to the global ocean, via the Çatalca Gap, as suggested in a recent study.

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Section: Palynologymentioning

confidence: 91%

Biostratigraphy and paleoenvironments of the Oligocene succession(İhsaniye Formation) at Karaburun (NW Turkey)

Simmons¹,

Bidgood²,

Connell³

et al. 2020

Turkish J Earth Sci

View full text Add to dashboard Cite

show abstract

Mineralogy, petrography, and Rock-Eval pyrolysis of late Oligocene coal seams in the Malkara coal field from the Thrace Basin (NW Turkey)

Karayi̇ǧi̇t

Oskay

Çelik

2021

International Journal of Coal Geology

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Uranium mineralization in the Thrace Basin, NW Türkiye: Evidence from radiation-induced defects in detrital quartz and synchrotron XRF/XANES analysis

Tunc,

Çelik,

Feng

et al. 2024

Journal of Geochemical Exploration

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Late Eocene to Early Oligocene palynostratigraphy of the Western Black Sea, Eastern Paratethys

Abstract: Introduction The Eocene-Oligocene transition, with its significant record of climate change, has received much attention (e.g.,

Cited by 4 publications

References 49 publications

Biostratigraphy and paleoenvironments of the Oligocene succession(İhsaniye Formation) at Karaburun (NW Turkey)

Biostratigraphy and paleoenvironments of the Oligocene succession(İhsaniye Formation) at Karaburun (NW Turkey)

Mineralogy, petrography, and Rock-Eval pyrolysis of late Oligocene coal seams in the Malkara coal field from the Thrace Basin (NW Turkey)

Uranium mineralization in the Thrace Basin, NW Türkiye: Evidence from radiation-induced defects in detrital quartz and synchrotron XRF/XANES analysis

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