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31.
The sedimentation rates in the Sea of Azov for the period of the last 2000 years (Late Azov stage) were studied by methods
of absolute geochronology, lithology, and biostratigraphy. The average sedimentation rate of the Late Azov deposits varied
from 0.4–0.8 to 1.5–2.0 mm per year. It reached as much as 4.0–6.0 mm per year in the areas close to the sharp coasts and
was defined by the area geomorphology. The scheme of the lithological transects, sedimentation rates, and absolute age of
the sediments is presented. The palaeoecology peculiarities of deposit accumulation during the Late Azov stage are described
from the diatom and spore-pollen analyses. 相似文献
32.
The transformation of the molecular and supramolecular structure under the thermal effect of ozokerites from the Yarega, Russia;
the Borislav, Ukraine; and the Shorsu, Uzbekistan deposits was studied. The elemental analysis, infrared spectroscopy, thermal
and X-ray diffraction analyses, gas-liquid and pyrolytic chromatography, gas chromatography-mass spectrosopy, and scanning
electron and atomic force microscopy were used. Heating up to 500°C results, first of all, in a decrease in the relative amounts
of normal paraffins. Significant transformations at the supramolecular level consist in the enlargement of previously existing
structural elements and the formation of new supramolecular units. 相似文献
33.
Early Cretaceous flora from coal-bearing strata of Markovsky Peninsula in South Primorye，Russia 总被引：1，自引：0，他引：1
The Early Cretaceous flora from the coal-bearing strata(Ussuri and Lipovtsy formations)in the Markovsky peninsula of South Primorye,Far East Russia,is reported in some detail in this paper.The flora containing over 80 species of about 50 genera can be divided into two assemblages.The paleofloristic characteristics and the comparisons of this flora with its coeval floras from the adjacent region of the eastern Heilongjiang of Northeast China,indicate the flora and its coal-bearing strata of the Markovsky peninsula can be compared to those of the Chengzihe and Muling formations of the Jixi area of Heilongjiang,representing probably the late Barremian and Aptian age,respectively. 相似文献
34.