نتایج جستجو برای: palynomorph
تعداد نتایج: 104 فیلتر نتایج به سال:
Sixty-four surface samples from the Lower Palaeozoic rock units (mainly Lalun,Abastu and Abarsaj formations) near Kholin-Darreh village in the Fazel Abad area,southeastern the Caspian Sea, Northern Iran, were analyzed to determine their agerelationships. The samples of Lalun Formation were barren, but those of Abastu andAbarsaj formations contained well-preserved and abundant palynomorph entiti...
Abstract The Ladinian–Carnian transition in the Tethys domain was accompanied by an important environmental change representing a milestone climate evolution of Triassic. However, estimations on paleodiversity composition and paleoenvironmental conditions across this interval are scarce marine settings due to lack fossil-bearing successions. In work, refined paleontological sedimentological stu...
Abstract The grazing lands of the High Atlas are vulnerable to climate change and decline traditional management practices. However, prior mid-20th century, there is little information examine historical environmental resilience past variability. Here, we present a new pollen, non-pollen palynomorph (NPP) microcharcoal record from sub-alpine marsh (pozzine) at Oukaïmeden, located in Marrakech A...
Premise of research. The flora the Maywood Formation, one only three Devonian floras previously recognized in western North America, is known from a brief report focused on stratigraphy and has never been characterized more detail. A detailed assessment this associated animal fossils implications for age depositional environments Formation plant biogeography.Methodology. Fieldwork at Cottonwood...
Geological materials such as rock fragments, microfossils and mineral grains are continuously being entrained (i.e. reworked) into soil during natural weathering processes. Distinctive reworked types in soil, specific components of them palynomorphs (organic microfossils), can prove extremely useful forensic investigations, i.e. to connect (match) people places. If the outcrop area a unique is ...
چکیده ندارد.
Fifty-seven samples taken from ten piston cores collected along a transect off the continental margin of the Northern Basin, Ross Sea, Antarctica were analyzed for palynomorphs. Moderately diverse assemblages of marine microplankton and terrestrial palynomorphs were recovered. The palynomorph assemblages have been subdivided into two main groups: the in-situ flora (including acritarchs, dinofla...
Statistical studies on Palynology contents of Late Cretaceous to Paleocene age Gurpi Formation in a surface section in Zagros Basin,SW Iran indicate changes in abundance, species diversity, ratio of Spiniferites to Cyclonephelium (S/C), palynological marine index(PMI) values and organic facies. These palynological variations clearly reflect fluctuations in relative sea-level and depositionalenv...
A palynological investigation of sixteen (16) outcrops from Mamfe Basin, southwest Cameroon, has been carried out using spores, pollen and organic matter components to establish the biostratigraphic framework basin reconstruct depositional paleoclimatic conditions. The inferred climatic trend is based on distribution pattern recovered species, mainly vertical occurrence disappearance, for time ...
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