نتایج جستجو برای: foraminifer

تعداد نتایج: 296  

Journal: :Spanish journal of palaeontology 2022

The sedimentary history and facies development of southern Egypt during the Latest Cretaceous Early Paleogene is summarized. G . eugubina Zone reported for first time from middle Egypt, where conglomerate usually marking a disconformity at Cretaceous/Tertiary boundary, absent. Uppermost Maastrichtian strata are attributed to M prinsii Zone, Late index foraminifer Abathomphalus mayaroensis (Boll...

2014
PAUL N. PEARSON HELEN K. COXALL

Hantkenina is a distinctive planktonic foraminiferal genus characterized by the presence of tubulospines (robust hollow projections) on each adult chamber, from Middle and Upper Eocene marine sediments worldwide. Here we illustrate its evolutionary origin using c. 150 specimens from 30 stratigraphic intervals in two sediment cores from Tanzania. The specimens, which span an estimated time inter...

Journal: :Journal of Experimental Marine Biology and Ecology 2012

Journal: :International Journal of Environment and Geoinformatics 2017

2007
T. M. Marchitto S. P. Bryan W. B. Curry D. C. McCorkle

[1] The recent development of foraminiferal Mg/Ca as a paleotemperature proxy has enabled the extraction of global ice volume and local salinity from the more traditional paleotemperature proxy dO. The benthic foraminiferal genus Cibicidoides is widely used in paleoceanographic reconstructions because of its epifaunal habitat and cosmopolitan distribution, and it has received early attention in...

Two stratigraphic sections (Kuh-e-Rahmat and Kuh-e-Sabz) of Upper Cretaceous strata in the Interior Fars region (SW of Iran) were selected. Lower Cretaceous succession of Kuh-e-Rahmat was consisted of Dariyan, Kazhdumi Sarvak and Ilam Formations. The lower contact of the Sarvak Formation with Kazhdumi Formation is described as a transitional type whereas the upper contact of Sarvak Formation wa...

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