Late Campanian Maastrichtian evolution of orbitoidal foraminifera in Haymana Basin succession Ankara Central Turkey

Date

1997-01-01

Author

Özcan, Ercan
Altıner, Sevinç

Metadata

Show full item record

Item Usage Stats

202
views

0
downloads

In Central Anatolia, a thick sedimentary succession composed of deep-water turbiditic units represented by marl-shale, sandstone, olistostromal horizons and carbonates crops out. This succession constitutes the lower part of so-called Haymana Basin spanning the Santonian (?)/Campanian-Eocene time interval. Evolution of Lepidorbitoides and Orbitoides concerning embryonic features and the initial chamber arrangement has been investigated in the Late Cretaceous part of this succession. Previously unrecognized assemblages of L. campaniensis - "primitive stage" of O. megaloformis of Late Campanian, L. bisambergensis - "advanced stage" of O. megaloformis of Early Maastrichtian and L. socialis - O. apiculata / O. gensacicus of Late Maastrichtian age have been documented with their biometric aspects. A wide range of variation of evolutionary parameters such as embryon size (Li+li) and number of epi-embryonic chambers (E) of the Orbitoides specimens in the same and successive populations has been observed. Existence of primitive Orbitoides (O. media type) embryons in phylogenetically advanced populations is very conspicuous. Concerning the variation in embryonic features (transition from biserial to quadriserial forms in Lepidorbitoides) and evolutionary parameters in Orbitoides (Li+li : Size of embryon, E : Number of epi-embryonic chambers) and Lepidorbitoides (D : Size of deuteroconch; D/P : Ratio of size of deuteroconch to protoconch; a : Number of a adauxiliary chambers) it can be proposed that Lepidorbitoides is more reliable than Orbitoides in aging the populations at least during Late Campanian-Early Maastrichtian time interval.

Subject Keywords

Ankara, Benthic foraminifera, Campanian-Maastrichtian, Central Turkey, Haymana Basin, Lepidorbitoides, Nepionic arrangement, Orbitoides

URI

https://hdl.handle.net/11511/87870
https://www.scopus.com/record/display.uri?eid=2-s2.0-0031399616&origin=resultslist&sort=plf-f&src=s&st1=&st2=&sid=b474a22f08e09f2bc14223e358ff9b0c&sot=b&sdt=b&sl=131&s=TITLE-ABS-KEY+%28Late+Campanian+Maastrichtian+evolution+of+orbitoidal+foraminifera+in+Haymana+Basin+succession+Ankara+Central+Turkey%29&relpos=0&citeCnt=18&searchTerm=

Journal

Revue de Paléobiologie

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

Upper Cretaceous planktonic foraminiferal biostratigraphy from NW Turkey calibration of the stratigraphic ranges of larger benthonic foraminifera Altıner, Sevinç (1999-01-01) Planktonic and larger benthonic foraminifers of the Upper Cretaceous (Santonian-Maastrichtian)-Lower Tertiary (Danian) rock units from north, northwest and central Anatolian fore-are basins have been investigated in order to improve the biostratigraphic resolution of this time interval. Total abundance and diversity of planktonic foraminifers vary from rare (the sequence from the Haymana region) to high (the sequences from the Cide, Caycuma, Hanonu and Yenikonak regions) and preservation is poor to moderate...
Late Cretaceous extensional denudation along a marble detachment fault zone in the Kirsehir massif near Kaman, central Turkey Lefebvre, Come; Barnhoorn, Auke; van Hinsbergen, Douwe J. J.; Kaymakcı, Nuretdin; Vissers, Reinoud L. M. (2011-08-01) In the Central Anatolian Crystalline Complex (CACC), 100 km scale metamorphic domains were exhumed in a context of north-south plate convergence during late Cretaceous to Cenozoic times. The timing, kinematics and mechanisms of exhumation have been the focus of previous studies in the southern Nigde Massif. In this study, we investigate the unexplored northern area regarding the tectonic features preserved on the edges of the Kirsehir Massif, based on detailed field-mapping in the Kaman area where high-grad...
Late Cretaceous-Eocene Geological Evolution of the Pontides Based on New Stratigraphic and Palaeontologic Data Between the Black Sea Coast and Bursa (NW Turkey) Ozcan, Zahide; Okay, Aral; Özcan, Ercan; Hakyemez, Aynur; Altıner, Sevinç (2012-01-01) The Late Cretaceous-Eocene geological evolution of northwest Turkey between the Black Sea and Bursa was studied through detailed biostratigraphic characterization of eleven stratigraphic sections. The Upper Cretaceous sequence in the region starts with a major marine transgression and lies unconformably on a basement of Palaeozoic and Triassic rocks in the north (Istanbul-type basement) and on metamorphic rocks and Jurassic sedimentary rocks in the south (Sakarya-type basement). Four megasequences have been...
Post miocene tectonic of çeltikçi graben, southern margin of galatian volcanic province, Central Anatolia Berberoğlu, Umur; Rojay, Fuat Bora; Department of Geological Engineering (2019) The Çeltikçi basin is located at the southern margin of a volcanic terrain known as “Galatian Volcanic Province” located on top of Cretaceous accretionary prism and to the south of North Anatolian Fault. The aim of this study is to investigate the difference in the style and intensity of deformation between Plio-Quaternary clastics and Miocene units. The units exposed in the area are classified as, from oldest to youngest, Miocene volcanics, Miocene Çeltikçi formation, Plio-Quaternary and Quaternary units. ...
Late Cretaceous extension and Palaeogene rotation-related contraction in Central Anatolia recorded in the Ayhan-Buyukkisla basin Advokaat, Eldert L.; van Hinsbergen, Douwe J. J.; Kaymakcı, Nuretdin; Vissers, Reinoud L. M.; Hendriks, Bart W. H. (2014-11-18) The configuration and evolution of subduction zones in the Eastern Mediterranean region in Cretaceous time accommodating Africa-Europe convergence remain poorly quantitatively reconstructed, owing to a lack of kinematic constraints. A recent palaeomagnetic study suggested that the triangular Central Anatolian Crystalline Complex (CACC) consists of three blocks that once formed an similar to N-S elongated continental body, underthrusted below ophiolites in Late Cretaceous time. After extensional exhumation a...

Citation Formats

E. Özcan and S. Altıner, “Late Campanian Maastrichtian evolution of orbitoidal foraminifera in Haymana Basin succession Ankara Central Turkey,” Revue de Paléobiologie, pp. 271–290, 1997, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/87870.