Abstract The age of the beginning magnetic polarity Chron M0r, a proposed marker for base Aptian Stage, is disputed due to divergence published radioisotopic dates and ambiguities in stratigraphic correlation sections. Our magnetostratigraphy core DH1 from Svalbard, Norway, calibrates bentonite bed, dated by U-Pb methods 123.1 ± 0.3 Ma, uppermost part magnetozone M1r, which ∼1.9 m.y. before M0r...

large benthic foraminifera and dasycladalean green algae are the most common and important (micro) fossils in lower cretaceous shallow-water sediments of the tethyan realm. in this paper, we introduced such taxa and their importance in age dating of lower cretaceous strata in the kopet-dagh sedimentary basin. also, according to determinations of index taxa (fauna and flora) in this period, the ...

On the Barents Shelf, northernmost and least explored hydrocarbon province of Norwegian Continental Upper Jurassic organic-rich shales have traditionally been given most attention as these represent prolific source rock unit region. However, in western frontier areas is too deeply buried. By combining high-resolution 2D seismic data, well logs, digitalized Rock-Eval this study documents lateral...

Fifty-four coal clast samples in the siliciclastic rocks (e.g., sandstone and conglomerate) were collected from cores of two-deep research wells (K20H K20K) drilled at Kozlu coalfield Zonguldak Basin, for first time, they evaluated using mineralogy by XRD SEM-EDX random vitrinite reflectance (%Rr) measurements order to find out their origin timing. Petrographic observations on polish surfaces s...

The purpose of this paper is to characterize the configuration northern Tunisia’s basin during Cretaceous on basis abundant slump folds and frequent synsedimentary faults. are studied determine slumps transport vergence submarine paleoslope. local regional stress field used syn-sedimentary deformation. During Valanginian–Aptian times, characterized by southward slope. From Albian Santonian anal...

An organic geochemical investigation combined with sequence stratigraphy was performed in the Ceará Basin, an offshore basin located Northeastern Brazil. The information available from 30 well logs (gamma-ray, resistivity, density), besides (TOC, and pyrolysis indexes) isotopic (?13C) data, aided preparation of a dataset for this study. application sequence-stratigraphic methods helped classify...

During the recent field research on the Tirgan Formation in the west of Kopet-Dagh sedimentary basin, ammonite assemblages were obtained from the carbonate strata of this formation. This new finding is important for stratigraphical purpose. In this research, 3 genera belong to Heteroceras, Deshayesites and Cheloniceras? as well as one uncertain genus belongs to Turkmeniceras are determined. The...