نتایج جستجو برای: microfossil

تعداد نتایج: 309  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Peter Stassen Robert P Speijer Ellen Thomas

Global warming during the Paleocene-Eocene thermal maximum (PETM) was associated with the release of large amounts of 12 C-enriched carbon, as reflected in the carbon isotope excursion (CIE) observed globally in sedimentary records. The New Jersey shelf PETM sequences are expanded relative to deep-sea settings, offering high temporal resolution to unravel the pathway of carbon release, although...

Journal: :Vertebrate paleobiology and paleoanthropology series 2022

OstracodsOstracoda (ostracod), charophytesCharophyta (charophyte) and pollenPollen were retrieved from sediments of the Baynunah Formation. Autoecological characteristics ostracodsOstracoda (ostracod) (charophyte), together with detailed observations on taphonomyTaphonomy ostracodOstracoda valves, provide a reconstruction depositional environments freshwater system. These microfossil assemblage...

Journal: :Applied sciences 2021

Diatomite is a powdering mineral mainly composed of diatom microfossils present in marine and lacustrine soils, which influences their physical mechanical properties. Although many articles have been found the literature concerning influence diatomite overall behavior natural few research efforts carried out to evaluate microfossil species on shear resistance. Therefore, this research, content ...

Journal: :Carbonates and Evaporites 2023

The basal Cambrian is characteristic for the appearance of small shelly fossils and acanthomorphic acritarchs with relatively vesicles. In Tarim Block (NW China) South China, this microfossil assemblage dominated by acanthomorphs was referred to as ‘Micrhystridium-Paracymatiosphaera-Megathrix’ (MPM) association, based on microfossils from lower Yurtus Xishanblaq formations Block. This study pro...

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