نتایج جستجو برای: some jurassic and cretaceous sediments sub
تعداد نتایج: 16973334 فیلتر نتایج به سال:
The oldest generally accepted fossil of mushroom-forming fungi (homobasidiomycetes) is Phellinites digiustoi, from the Jurassic of Patagonia. The next-oldest homobasidiomycete fossil does not occur until about 70 million years later, in the mid-Cretaceous. The goal of this project was to reassess the identity of Phellinites and refine the minimum-age estimate for the origin of homobasidiomycete...
The head and mouthpart structures of 11 species of Eurasian scorpionflies represent three extinct and closely related families during a 62-million-year interval from the late Middle Jurassic to the late Early Cretaceous. These taxa had elongate, siphonate (tubular) proboscides and fed on ovular secretions of extinct gymnosperms. Five potential ovulate host-plant taxa co-occur with these insects...
The Orussidae is a small and rare but phylogenetically important family of parasitoid wasps. The fossil record of the family is also very poor. Baltorussus velteni was described from Baltic amber from an allegedly female specimen. This and another recently discovered specimen are examined with microCT scanning and standard microscopy. We reveal that both the holotype and the new specimen are ac...
Environmental perturbations during mass extinctions were likely manifested differently in epicontinental seas than in open-ocean-facing habitats of comparable depth. Here, we present a dissection of origination and extinction in epicontinental seas versus open-ocean-facing coastal regions in the Permian through Cretaceous periods, an interval through which both settings are well represented in ...
as some definitions show, idioms are expressions whose meanings cannot be obtained from individual words. in every society, people use their own conceptions and feelings through different idioms and expressions. so every culture and society has their own idioms. some scholars proposed methods for translating idioms but baker’s strategies are very important and constructive. this research tried ...
in this study reference as one of the five cohesive devices in the achievement of textuality in english and persian narrative/descripitive written texts is focused on and analysed . to do so , the theoretical framework elaborated by halliday and hasan (1976) and its version adapted by the writer to match the sub-types of reference in farsi are applied to the analysis of reference in english and...
the aim of conducting this study was to investigate the foreign language learning needs of undergraduate economics students and business management students in faculties of social sciences of alzahra and azad naragh university. in the study, which was designed on the basis of a qualitative-quantitative basis using interviews and questionnaires, 146 female undergraduate business management as we...
The history of geological cartography the present territory Lithuania starts with a map published by Jean Etienne Guettard in 1764 and followed maps Stanisław Staszic 1806, Ignacy Domeyko 1837, Frederic Dubois de Montpereaux 1830. A new period investigations compilation about 1840 is closely related development stratigraphic knowledge; therefore, this marks beginning mapping using concept (Helm...
Detrital-zircon U-Pb geochronology is extensively used to imply provenance histories as one of the most common methods constrain tectonic evolution ancient sedimentary systems. The rapid accumulation detrital-zircon thermochronology data in eastern Tien Shan region brought great convenience for understanding basin–mountain region. In this work, 41 samples zircon dating from Jurassic–Cretaceous ...
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