نتایج جستجو برای: chronostratigraphy

تعداد نتایج: 210  

Journal: :Quaternary Geochronology 2021

Lake sediment archives covering several glacial cycles are scarce in the Southern Hemisphere and they challenging to date. Here we present chronostratigraphy of oldest continuous lake archive Tasmania, Australia; a 5.5 m 270 ka (Marine Isotope Stage 8) core from Selina. We employ radiometric dating (radiocarbon optically stimulated luminescence) relative (geomagnetic climate comparisons). Bayes...

Journal: :Frontiers in Earth Science 2022

Loess-paleosol sequences are the most intensively studied terrestrial archives used for reconstruction of Late Pleistocene environmental and climatic changes in Azov Sea region, southwest Russia. Here we present a refined chronostratigraphy multiproxy record dynamics complete representative loess–paleosol (Beglitsa Chumbur-Kosa sections) from region. We propose new following Chinese Danubean lo...

Journal: :Frontiers in Earth Science 2022

Site U1501 of International Ocean Discovery Program (IODP) Expedition 368 locates on a broad regional basement high in the northern margin South China Sea (SCS). This study refines chronostratigraphy upper 160 m sedimentary succession from Hole U1501C using paleomagnetic measurements and cyclostratigraphic analysis Natural Gamma Radiation (NGR) data. Rock magnetic displays that signal sediments...

Journal: :Communications earth & environment 2022

Abstract Volcanic ash layers are important markers for the chronostratigraphy of paleoclimate and paleoenvironmental archives at southern tip South America. However, this requires that tephras well-dated. We report geochemical data from stalagmite MA1 formed in a non-karst cave near Mt. Burney volcano southernmost Patagonia (~53°S). High-resolution LA-ICP-MS analyses, SEM imagery, EPMA data, Na...

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