calcareous nannofossils in boundary of tirgan and sarcheshmeh formations at qalezo section have been studied. this section is situated in the west of kopet-dagh basin. in this study 35 nannoplankton species of 17 genera were identified. according to the first occurrence of index species and fossil assemblages two calcareous nannofossil biozones (cc7-cc8) of sissingh (1997) have been recognized....

Background. The Cretaceous of southern Europe was characterized by an archipelago setting with faunas of mixed composition of endemic, Laurasian and Gondwanan elements. However, little is known about the relative timing of these faunal influences. The Lower Cretaceous of East-Central Europe holds a great promise for understanding the biogeographic history of Cretaceous European biotas because o...

The mid-Cretaceous histories (origin, growth, death) of algal-rudist-stromatoporoid reef communities located on many Pacific Basin guyots are complex and controversial. These shallow water, tropical communities originated on volcanic edifices extruded during the Barremian-Albian, grew upward during edifice subsidenceftransgression throughout the Aptian, Albian and Cenomanian and several of them...

Three well - known source rocks of the Zagros basin and the Persian Gulf are Mesozoic in age.The Jurassic Sargelu, Albian Kazhdumi and Neocomian-Coniacian Garau formations have charged the Cretaceous reservoirs of this area. The northwest part of the Persian Gulf is strongly influenced by two major N-S trending paleohighs (Hendijan- Bahregansar-Regesafid-Izeh and Kharge- Mish) and surrounding p...

The Arrifes section (Algarve Basin, Southern Portugal) has been studied from the viewpoint of charophyte biostratigraphy. previous sedimentological studies in this showed that it is built interbedding continental and marine facies contain both palynomorphs (pollen, spores, dinoflagellates), providing an excellent sedimentary context to perform direct correlations between domains. In present wor...

Samples of Albian Tégulines Clay outcropping near Brienne-le-Château in the eastern part Paris Basin were subjected to a geochemical characterization organic matter (OM), combining OM bulk Rock-Eval analysis (RE), petrography and molecular analysis. In this study, objective was investigate oxidation natural critical zone developed early reduced marine clay formation. For that purpose, core samp...

Abstract Reconstruction of Aptian–Albian paleoclimate obtained from marine records remains a challenging topic, but studies on coeval terrestrial and trigger mechanisms have lagged substantially. In this study, new multiproxy data mudrocks in the Fuxin Basin NE China provide high-resolution climate record East Asia. Here, we demonstrate occurrence cooling during late Aptian (118–113 Ma), which ...

Here we describe a new Lower Cretaceous palynoflora from the Lusitanian Basin, located in westernmost sector of Iberian Peninsula. The spore-pollen assemblage was extracted samples collected Carregueira clay pit complex, near village Juncal, western Portugal, sedimentary deposits belonging to Figueira da Foz Formation. A rich and well-preserved palynoflora, typical non-marine fluvial environmen...

Cretaceous aeolian deposition is important for understanding variations of the tropical−subtropical atmospheric circulation under greenhouse background. Nevertheless, detailed records revealing response to rising CO2 are still lacking. To shed light on their linkage, we examined Early stratigraphic evolution Hekou Group in Baiyin-Jingyuan Basin, northern China, using multiple methods. The resul...