Biogeographic distribution of rudists and benthic foraminifera: An approach to Campanian-Maastrichtian palaeobiogeography of Turkey

Özer, Sacit; Merıç, Engin; Görmüş, Muhittin; Kanbur, Süveyla

doi:10.1016/j.geobios.2009.02.004

Cited by 37 publications

(4 citation statements)

References 21 publications

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Section: Paleogeographymentioning

confidence: 90%

“…The occurrence of this species in the Zekeriyaköy Formation marks the most eastern record of the genus in the Tethys. Praesiderolites, known in detail from the Aquitaine and Pyrenean basins, was also reported from the late Campanian of Turkey (Korkmaz et al, 1993;Özcan, 1993;Fenerci and Özer, 1998;Özer et al, 2009). Campanian Orbitoides, on the other hand, is widespread, occurring in the tropics and subtropics, from the Caribbean to South Asia (Loeblich and Tappan, 1988;Goldbeck and Langer, 2009).…”

Section: Paleogeographymentioning

confidence: 91%

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Late Campanian larger benthic foraminifera from the Zekeriyaköy Formation (İstanbul, NW Turkey): taxonomy, stratigraphy, and paleogeography

Erdem¹,

Özcan²,

Yücel³

et al. 2021

Turkish J Earth Sci

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North of İstanbul, a thick Upper Cretaceous volcanic and volcanoclastic sequence of the Yemişliçay Group is nonconformably overlain by the neritic clastic and carbonate 2 sequence of the Zekeriyaköy Formation. This unit, either placed within the volcanic sequence or interpreted to overlie it, was studied near Zekeriyaköy for its larger foraminifera, previously recurrently referred to the Maastrichtian. The basal epiclastic sandstone beds of the Zekeriyaköy Formation immediately above the volcanic sequence contain Praesiderolites dordoniensis and rare rudist shells. The higher sandstone and limestone beds comprise assemblages of Lepidorbitoides campaniensis, Orbitoides megaloformis, Vanderbeekia catalana, Siderolites gr. calcitrapoides, Sirtina orbitoidiformis, Praestorrsella roestae, Lenticulina rotulata, Planorbulina (?) sp., agglutinated and rotaliid foraminifera, rudist fragments, bryozoans and red algae. Lepidorbitoides, the most abundant foraminifera in the studied material, has predominantly L. campaniensis-type embryons with a single auxiliary chamberlet, and rarely L. bisambergensis-type embryons, characterized by having two such chamberlets. The Praesiderolites dordoniensis-Lepidorbitoides campaniensis-Vanderbeekia catalana assemblages, recorded for the first time from Turkey, suggest a late Campanian age for the Zekeriyaköy Formation, with the implication that Late Cretaceous volcanism terminated in the İstanbul region during or prior to the late Campanian. The faunas show a great resemblance to those from the late Campanian type section at Aubeterre (SW France) and late Campanian fauna of Pyrenean Basin (N Spain), and correspond to the most eastern record of the European Faunal Province of the Tethys.

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Section: Paleogeographymentioning

confidence: 90%

Section: Paleogeographymentioning

confidence: 91%

Late Campanian larger benthic foraminifera from the Zekeriyaköy Formation (İstanbul, NW Turkey): taxonomy, stratigraphy, and paleogeography

Erdem¹,

Özcan²,

Yücel³

et al. 2021

Turkish J Earth Sci

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show abstract

“…In spite of the overall evolutionary trend in the increase of embryon size and formation of a greater number of epi-auxiliary chamberlets from the Campanian to the end of the Maastrichtian (Fig. 7), the occurrence of Orbitoides specimens consisting of small embryons with only a few epi-embryonic chamberlets has been frequently been reported associated with the phylogenetically advanced species such as O. gruenbachensis, O. apiculatus and O. gensacicus during the Maastrichtian (Baumfalk, 1986;Eggink & Baumfalk, 1983;Meriç, 1965;Özcan & Özkan-Altıner, 1997Özcan & Özkan-Altıner, , 1999Özer et al 2009). These specimens were either assigned to O.…”

Section: Species Concept and Evolutionary Trends In Orbitoidesmentioning

confidence: 99%

Multiple Orbitoides d’Orbigny lineages in the Maastrichtian? Data from the Central Sakarya Basin (Turkey) and Arabian Platform successions (Southeastern Turkey and Oman)

et al. 2021

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The standard reconstruction of species of Orbitoides d’Orbigny into a single lineage during the late Santonian to the end of the Maastrichtian is based upon morphometric data from Western Europe. An irreversible increase in the size of the embryonic apparatus, and the formation of a greater number of epi-embryonic chamberlets (EPC) with time, is regarded as the main evolutionary trends used in species discrimination. However, data from Maastrichtian Orbitoides assemblages from Central Turkey and the Arabian Platform margin (Southeastern Turkey and Oman) are not consistent with this record. The Maastrichtian Besni Formation of the Arabian Platform margin in Southeastern Turkey yields invariably biconvex specimens, with small, tri- to quadrilocular embryons and a small number of EPC, comparable to late Campanian Orbitoides medius (d’Archiac). The upper Maastrichtian Taraklı Formation from the Sakarya Basin of Central Turkey contains two distinct, yet closely associated forms of Orbitoides, easily differentiated by both external and internal features. Flat to biconcave specimens possess a small, tri- to quadrilocular embryonic apparatus of Orbitoides medius-type and a small number of EPC, whereas biconvex specimens possess a large, predominantly bilocular embryonic apparatus, and were assigned to Orbitoides ex. interc. gruenbachensis Papp–apiculatus Schlumberger based on morphometry. The flat to biconcave specimens belong to a long overlooked species Orbitoides pamiri Meriç, originally described from the late Maastrichtian of the Tauride Mountains in SW Turkey. This species is herein interpreted to be an offshoot from the main Orbitoides lineage during the Maastrichtian, as are forms that we term Orbitoides ‘medius’, since they recall this species, yet are younger than normal occurrence with the accepted morphometrically defined lineage. The consistent correlation between the external and internal test features in O. pamiri implies that the shape of the test is not an ecophenotypic variation, but appears to be biologically controlled. We, therefore, postulate that more than one lineage of Orbitoides exists during the Maastrichtian, with a lineage that includes O. ‘medius’ and O. pamiri displaying retrograde evolutionary features.

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“…The internal structural features (caves, dolines, karstic fragments) limestone that is massive or thick-layered, varying in colour from yellow to grey, and is occasionally clayey, sandy, dolomitic, and brecciated (Korkmaz 1993;İnan et al 1999;Köroğlu 2018;Kandemir and Köroğlu 2019b;Consorti and Köroğlu 2019;Consorti et al 2020). Karstic caves developed in typically steep hills formed by limestone that is highly fractured, soluble, and contains rudist shells (Ofluoğlu 1993;Korkmaz 1993;Özer et al 2009;Törk et al 2013;Köroğlu and Kandemir 2019a, b).…”

Section: Geological Framework and Study Areamentioning

confidence: 99%

Deciphering of karst geomorphology and sinkhole (doline) structures using multiple geophysical and geological methods (Trabzon, NE Türkiye)

Alemdağ,

Köroğlu,

Aydın

et al. 2024

Bull Eng Geol Environ

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To date, in Türkiye only a limited number and volume of combined geophysical and geological studies about karst have been performed. In this study, karstification and geomorphological features were examined with geophysical and geological methods together and initial results were obtained for Türkiye. Although the geology of the limestone forming the Şahinkaya Member, which contains Çayırbağı, Çalköy, and Çal Cave, near the Düzköy district of Trabzon/Türkiye province was studied by many researchers to date, there is no geophysical study to determine the internal structural features, groundwater, dolines, and karstic voids. The aim of this study was to identify karst formations and their structural extensions in Şahinkaya Member with geophysical methods. Therefore, three different study locations with a total surface area of approximately 3.2 km2 were examined with electrical resistivity tomography, self-potential, seismic refraction tomography, multichannel analysis of surface waves, and ground penetrating radar. These geophysical applications in limestone helped to identify karst cavities, water-saturated zones and dolines. Finally, the order of priority and efficiency of the five applied geophysical methods was compared, and the stages of the applications were outlined. In addition, the origin of karstification in the area investigated in this study was supported by petrographic, petrophysical and rock mechanic data.

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Biogeographic distribution of rudists and benthic foraminifera: An approach to Campanian-Maastrichtian palaeobiogeography of Turkey

Cited by 37 publications

References 21 publications

Late Campanian larger benthic foraminifera from the Zekeriyaköy Formation (İstanbul, NW Turkey): taxonomy, stratigraphy, and paleogeography

Late Campanian larger benthic foraminifera from the Zekeriyaköy Formation (İstanbul, NW Turkey): taxonomy, stratigraphy, and paleogeography

Multiple Orbitoides d’Orbigny lineages in the Maastrichtian? Data from the Central Sakarya Basin (Turkey) and Arabian Platform successions (Southeastern Turkey and Oman)

Deciphering of karst geomorphology and sinkhole (doline) structures using multiple geophysical and geological methods (Trabzon, NE Türkiye)

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