Campanian-Maastrichtian planktonic foraminiferal investigation and biostratigraphy (Kokaksu section, Bartın, NW Anatolia) : remarks on the cretaceous paleoceanography based on quantitative data

Güray, Alev
The aim of this study is to delineate the Campanian-Maastrichtian boundary by using planktonic foraminifers. In this manner, Kokaksu Section (Bartın, NW Anatolia) was selected and the Akveren Formation, characterized by a calciturbiditic-clayey limestone and marl intercalation of Campanian-Maastrichtian age, was examined. 59 samples were emphasized for position of boundary. Late Campanian-Maastrichtian planktonic foraminifers were studied in thin section and by washed samples. Two different biostratigraphical frameworks have been established. Globotruncanid zonation consists of Campanian Globotruncana aegyptiaca Zone, Upper Campanian-Middle Maastrichtian Gansserina gansseri Zone and Upper Maastrichtian Abathomphalus mayaroensis Zone, whereas heterohelicids biozonation includes Campanian Pseudotextularia elegans Zone, Lower Maastrichtian Planoglobulina acervuloinides Zone, Middle Maastrichtian Racemiguembelina fructicosa Zone and Upper Maastrichtian Pseudoguembelina hariensis Zone. Campanian-Maastrichtian boundary was determined as the boundary between Pseudotextularia elegans and Planoglobulina acervuloinides zones and Cretaceous-Tertiary boundary was designated by total disappearance of Late Cretaceous forms. Heterohelicid biozonation has been established in this study for the first time in Turkey. Collecting 300 individuals from each sample, diversity and abundance of assemblages were analyzed in terms of genus and species. ir evaluation of are important in observation of evolutionary trends and ecological changes. Moreover, evolution of different morphotypes is important in this evaluation. Such a study is new in Turkey in terms of examination of responses of planktonic foraminifers to environmental changes. Taxonomic framework has been constructed to define each species and differences of comparable forms have been discussed. Both scanning electron microscope (SEM) photographs and thin section photographs were used in order to show se distinctions.


Micropaleontological analysis and facies evolution across the tournaisian-visean boundary in aladağ unit(Central Taurides, Turkey)
Peynircioğlu, Ali Ahmet; Altıner, Demir; Department of Geological Engineering (2005)
This study aims to enlighten microfacies evolution and micropaleontological properties of the Tournaisian ا Visean boundary in Aladağ Unit (Central Taurides, Turkey). Two sections comprising dark shale and dark limestone alternations, including a fairly dolomitized part towards their top are measured. The microfacies analysis suggests a subtidal depositional environment. Foraminiferal assemblages were distinguished at Section AP and biozonation was documented. The biozonation separates the measured section ...
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Özel, Barış; He, Lili; McClements, David Julian (Elsevier BV, 2020-11-01)
In this study, we encapsulated both animal-derived (whey) and plant-derived (soy and pea) proteins within polysaccharide/protein beads and measured the digestion of these beads under simulated gastrointestinal tract (GIT) conditions. Bead dimensions were measured using a digital caliper and found to increase as the shear thinning behavior of the protein/polysaccharide solutions used to form them increased. The hydrolysis of the plant and animal proteins trapped inside the protein/polysaccharide beads was st...
Taxonomy and distribution of the benthic foraminifera in the gulf of İskenderun, Eastern Mediterranean
Oflaz, Sabire Aslı; Altıner, Sevinç; Department of Geological Engineering (2006)
The present study aims to investigate the foraminiferal assemblages of the recent samples in terms of abundance and diversity, to determine the bathymetrical and the geographical distributions of the foraminiferal assemblages. This study further intends to put forward the responses of foraminifers to environmental factors (e.g. bathymetry, salinity, substrate, pollution, water currents, etc.) on the distribution of foraminifers. In this manner, foraminiferal fauna has been taxonomically identified and quant...
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Eleven dinoflagellates, acritarchs, and pollen biozones have been identified in Upper Eocene to Pliocene sediments combined from Muş, Tekman, Tercan-Aşkale, Pasinler-Horasan basins and the Bayburt-Kars Plateau in this study. FAD̕s of Compositae (tubuliflorae type), Slowakipollenites hipophäeoides, Mediocolpopollis compactus, Monoporopollenites gramineoides and Umbelliferae at the base of Rupelian, FAD of Wetzeliella gochtii in the أmiddleؤ Rupelian, LAD of Ascostomocystis potane in the late Rupelian, LAD of...
Cinnamon oil nanoemulsions by spontaneous emulsification: Formulation, characterization and antimicrobial activity
YILDIRIM, Simge Tutku; Öztop, Halil Mecit; Soyer, Yeşim (Elsevier BV, 2017-10-01)
The goal of this study was to formulate stable cinnamon oil nanoemulsions (NEs) exhibiting high anti-microbial activity by using the low-energy approach: spontaneous emulsification (SE) and compare it with two high-energy methods. To prepare the nanoemulsions by SE, oil phase containing cinnamon oil (CO) and carrier oil (coconut oil (CNO)) at different ratios (2:8-10:0) and surfactant (Tween 80) at 10% (w/w) was titrated into an aqueous phase (distilled water). For antimicrobial activity, agar disc diffusio...
Citation Formats
A. Güray, “Campanian-Maastrichtian planktonic foraminiferal investigation and biostratigraphy (Kokaksu section, Bartın, NW Anatolia) : remarks on the cretaceous paleoceanography based on quantitative data,” M.S. - Master of Science, Middle East Technical University, 2006.