A COMPARATIVE ANALYSIS OF CHANGING SEDIMENTATION CONDITIONS DURING THE LAST INTERGLACIAL-GLACIAL MACROCYCLE IN THE LOESS AREAS OF THE SOUTHERN EAST EUROPEAN PLAIN (THE AZOV SEA REGION) AND CENTRAL CHINA (LOESS PLATEAU)

2017 ◽  
pp. 3-18 ◽  
Author(s):  
A. A. VELICHKO ◽  
T. YANG ◽  
A. O. ALEKSEEV ◽  
O. K. BORISOVA ◽  
P. I. KALININ ◽  
...  
Author(s):  
А. В. Колесник ◽  
Е. И. Ревина ◽  
А. К. Очередной ◽  
А. Ю. Данильченко ◽  
Ю. Н. Зоров

Изучение среднего и нижнего палеолита юга Восточно-Европейской равнины до сих пор во многом связано с редкими памятниками, расположенными в Северо-Восточном Приазовье (Герасимовка, Рожок I, Носово) и в нижнем течении р. Северский Донец (Хрящи, Михайловское), поэтому любые сведения о новых комплексах этих эпох представляют большой интерес. В статье впервые представлены материалы нового местонахождения каменного века Батай III, открытого более сорока лет назад, расположенного в дельте Дона в устье р. Койсуг. На строительной площадке в перемещенном грунте аллювиального генезиса (рис. 1: 2,3) была собрана коллекция кремневых изделий, состоящая в основном из артефактов среднепалеолитического облика. Основой для них послужил местный галечный кремень. Цвет сырья буро-коричневый (рис. 2: 1b). Патина варьирует от желто-коричневой до красновато-бурой. Коллекция включает нуклевидные изделия, пренуклеусы, небольшой плоско-выпуклый бифас миндалевидной формы (рис. 3: 1a, b), остроконечник (рис. 3: 4a), различные сколы. Наиболее близкие аналогии происходят из местонахождения палеолита у х. Михайловское - недалеко от впадения р. Северский Донец в Дон. So far the studies of the Middle and Lower Paleolithic in the South of the East European Plain have been linked to rare sites located in the northeastern of Azov Sea region (Gerasimovka, Rozhok I, and Nosovo) and the downstream of the Severskiy Donets river (Khryashchi, and Mikhaylovskoe); that is why, any information on new assemblages dating to these historical periods are of great interest. Materials from Batay III, which is a new Stone Age location discovered more than forty years ago, are described for the first time. This site is located in the Don estuary in the mouth of the Koysug river. An assemblage of flint items made up mostly of the Middle Paleolithic artifacts was collected in alluvial soil removed from the construction site (Fig. 1: 2, 3). Local pebbles were used as the main source material. The raw material is reddish-brown (Fig. 2: 1b). The patina varies from yellow-brown to reddish-black. The assemblage includes core-like items, pre-cores, a small almond-shaped plano-convex biface (Fig. 3: 1а, b), a point (Fig. 3: 4а), and various flakes. The closest analogies come from a Paleolithic location near the village of Mikhaylovskoe not far from the place where the Severskiy Donets joins the Don.


Clay Minerals ◽  
1999 ◽  
Vol 34 (4) ◽  
pp. 525-532 ◽  
Author(s):  
Junfeng Ji ◽  
Jun Chen ◽  
Huayu Lu

AbstractIllite, the predominant component of the clay fraction of the Chinese loess, has been studied by X-ray diffraction (XRD) in 33 samples taken from the Holocene palaeosol (S0), the last glacial loess (L1) and the last interglacial palaeosol (S1) in the Louchuan loess section of the Loess Plateau in China. The XRD investigations indicate that it is mainly a 2M1 dioctahedral mineral with crystallinity values ranging from 0.23 to 0.36°Δ2θ (CIS Index). The 2M1 polytype illites with low IC values preclude a pedogenic formation of illites in the surface horizons of aridic and semi-aridic soils or deserts, and thus the clay mineral composition was largely determined by provenance. The illites are considered to be of detrital origin derived from pre-existing sediments and very low- to low-grade metamorphic rocks, eroded from the northern part of the Tibetan Plateau. The clay content of the loess and palaeosols was largely controlled by the strength of the winter monsoon, rather than by effects of in situ pedogenetic processes.


2017 ◽  
pp. 94-108 ◽  
Author(s):  
Yu. A. Semenishchenkov

Phytogeographical features of forest vegetation at the level of lower-rank syntaxa were being discussed in literature since the early 20th century (Cajander, 1903; Sukachev, 1926; Braun-Blanquet, 1964; Kral et al., 1975; Kleopov, 1990; Bulokhov, 2003; Ellenberg, 2009), however, phytocoenologists still have no uniform interpretation and geographical maintenance of lower classification units. Forest vegetation of the European part of Russia is well studied according to Braun-Blanquet approach with association as a system of geographical subassociations. The paper offers the approaches to the reflection of geographical variations of the natural forest vegetation in the basin of the Upper Dnieper (central part of the East European Plain) at the level of lower-rank syntaxa The xeromesophytic oak woods in the basin of the Upper Dnieper belong to the East European ass. Lathyro nigri–Quercetum roboris Bulokhov et Solomeshch 2003. Floristic differentiation of this association from the similar Central European ass. Potentillo-Quercetum is given. These two associations have large blocks of geographically significant differential species that does not allow to consider them as a part of one association. The suggested approach allows to define the chorological content of units of lower syntaxonomical ranks and make regional classification schemes comparable to each other.


Coronaviruses ◽  
2020 ◽  
Vol 01 ◽  
Author(s):  
Chandra Mohan ◽  
Vinod Kumar

: World Health Organization (WHO) office in China received the information of pneumonia cases of unknown aetiology from Wuhan, central China on 31st December 2019, subsequently this disease spreading in china and rest of world. Till the March 2020 end, more than 2 lakhs confirmed cases with more than 70000 deaths were reported worldwide, very soon researchers identified it as novel beta Corona virus (virus SARS-CoV-2) and its infection coined as COVID-19. Health ministries of various countries and WHO together fighting to this health emergency, which not only affects public health, but also started affecting various economic sectors as well. The main aim of the current article is to explore the various pandemic situations (SARS, MERS) in past, life cycle of COVID-19, diagnosis procedures, prevention and comparative analysis of COVID-19 with other epidemic situations.


2021 ◽  
Vol 4 (1) ◽  
Author(s):  
R. Dinnis ◽  
A. Bessudnov ◽  
N. Reynolds ◽  
T. Devièse ◽  
A. Dudin ◽  
...  

AbstractThe Streletskian is central to understanding the onset of the Upper Palaeolithic on the East European Plain. Early Streletskian assemblages are frequently seen as marking the Neanderthal-anatomically modern human (AMH) anthropological transition, as well as the Middle-to-Upper Palaeolithic archaeological transition. The age of key Streletskian assemblages, however, remains unclear, and there are outstanding questions over how they relate to Middle and Early Upper Palaeolithic facies. The three oldest Streletskian layers—Kostenki 1 Layer V, Kostenki 6 and Kostenki 12 Layer III—were excavated by A. N. Rogachev in the mid-20th century. Here, we re-examine these layers in light of problems noted during Rogachev’s campaigns and later excavations. Layer V in the northern part of Kostenki 1 is the most likely assemblage to be unmixed. A new radiocarbon date of 35,100 ± 500 BP (OxA- X-2717-21) for this assemblage agrees with Rogachev’s stratigraphic interpretation and contradicts later claims of a younger age. More ancient radiocarbon dates for Kostenki 1 Layer V are from areas lacking diagnostic Streletskian points. The Kostenki 6 assemblage’s stratigraphic context is extremely poor, but new radiocarbon dates are consistent with Rogachev’s view that the archaeological material was deposited prior to the CI tephra (i.e. >34.3 ka BP). Multiple lines of evidence indicate that Kostenki 12 Layer III contains material of different ages. Despite some uncertainty over the precise relationship between the dated sample and diagnostic lithic material, Kostenki 1 Layer V (North) therefore currently provides the best age estimate for an early Streletskian context. This age is younger than fully Upper Palaeolithic assemblages elsewhere at Kostenki. Other “Streletskian” assemblages and Streletskian points from younger contexts at Kostenki are briefly reviewed, with possible explanations for their chronostratigraphic distribution considered. We caution that the cultural taxon Streletskian should not be applied to assemblages based simply on the presence of bifacially worked artefacts.


2018 ◽  
Vol 51 (1) ◽  
pp. 66-72 ◽  
Author(s):  
A. T. Barabanov ◽  
S. V. Dolgov ◽  
N. I. Koronkevich ◽  
V. I. Panov ◽  
A. I. Petel’ko

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 544
Author(s):  
Xuhong Zhao ◽  
Lifang Kang ◽  
Qian Wang ◽  
Cong Lin ◽  
Wei Liu ◽  
...  

As a potential energy crop with high biomass yield, Miscanthus lutarioriparius (M. lutarioriparius), endemic to the Long River Range in central China, needs to be investigated for its acclimation to stressful climatic and soil conditions often found on the marginal land. In this study, traits related to acclimation and yield, including survival rates, plant height (PH), stem diameter (SD), tiller number (TN), water use efficiency (WUE), and photosynthetic rates (A), were examined for 41 M. lutarioriparius populations that transplanted to the arid and cold Loess Plateau of China. The results showed that the average survival rate of M. lutarioriparius populations was only 4.16% over the first winter but the overwinter rate increased to 35.03% after the second winter, suggesting that plants having survived the first winter could have acclaimed to the low temperature. The strikingly high survival rates over the second winter were found to be 95.83% and 80.85%, respectively, for HG18 and HG39 populations. These populations might be especially valuable for the selection of energy crops for such an area. Those individuals surviving for the two consecutive winters showed significantly higher WUE than those measured after the first winter. The high WUE and low stomatal conductance (gs) observed in survived individuals could have been responsible for their acclimation to this new and harsh environment. A total of 61 individuals with productive growth traits and strong resistance to cold and drought were identified for further energy crop development. This study showed that the variation of M. lutarioriparius held great potential for developing energy crops following continuous field selection.


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