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The Impact of Paleocryogenesis on the Formation of Gray Forest Soils in Central Russia
Eurasian Soil Science ( IF 1.4 ) Pub Date : 2020-10-26 , DOI: 10.1134/s1064229320100142
A. Yu. Ovchinnikov , V. M. Alifanov , O. I. Khudyakov

Abstract—

The paleogeographic development of the natural process in the Late Pleistocene on the East European Plain had a rhythmic pattern with repeated alternation of cold and warm climatic eras. Continental glaciations arising on the East European Plain, in particular, the Late Valdai (Weichselian) glaciation, were reflected in changes in topography formation. Regional paleoenvironmental conditions of the formation of modern soil cover in the area of gray forest soils in central Russia are discussed. The impact of paleocryogenesis on the features of the Holocene soils is considered by the example of Vladimir and Moscow oblasts. In Vladimir oblast, soils were studied in Suzdal district on the territory of the Kibol-5 archaeological site of the early Middle Ages. In Moscow oblast, studied were conducted at the Pushchino key site. The differentiation of soil profiles related to the specificity of parent materials formed under the impact of the Late Weichselian paleocryogenesis with the development of cryogenic microtopography was demonstrated. It was also found that the surface microtopography is predetermined by the buried paleocryogenic polygonal network of elevated blocks (microhighs) and interblock depressions (microlows). The paleocryogenic genesis of this microtopography caused by cryogenic deformation of large wedge-shaped features was confirmed. Large cryogenic wedge-shaped soil features in the study area formed about 22–14 ka ago, which is confirmed by radiocarbon data. The dependence of the Holocene loamy soils in central Russia on the characteristics of parent materials is manifested at the levels of soil profiles, soil horizons, and particular soil properties. It is argued that the presence of Late Pleistocene paleocryogenic features greatly affects the formation of the profiles of Holocene soils and enhances the action of the anthropogenic factor on soil development. As an environmental factor, Late Weichsel paleocryogenesis differentiates soils at the high taxonomic level contributing to the formation of complex soil cover patterns.



中文翻译:

俄罗斯中部古气候发生对灰色森林土壤形成的影响

摘要-

东欧平原上的晚更新世的自然过程的古地理发展具有节奏模式,冷,暖气候时代反复交替。东欧平原上出现的大陆性冰川,特别是瓦尔达河(Weichselian)晚期冰川,反映在地形形成的变化中。讨论了俄罗斯中部灰色森林土壤区域现代土壤覆盖形成的区域古环境条件。弗拉基米尔州和莫斯科州的例子考虑了古新生代对全新世土壤特征的影响。在弗拉基米尔州,在中世纪早期Kibol-5考古遗址的苏兹达尔地区研究了土壤。在莫斯科州,在Pushchino关键地点进行了研究。结果表明,随着低温微地形学的发展,土壤剖面的分化与在晚魏氏古生化作用下形成的母体材料的特异性有关。还发现表面微形貌是由高块(微高)和块间凹陷(微低)的埋藏的古低温多边形网络预先确定的。证实了由大楔形特征的低温变形引起的这种微形貌的古低温成因。研究区域中约22–14 ka年前形成了大型的低温楔形土壤特征,这已由放射性碳数据证实。俄罗斯中部全新世壤土土壤对母体材料特征的依赖性表现在土壤剖面,土壤层位和特定土壤性质的水平上。有人认为,晚更新世古低温特征的存在极大地影响了全新世土壤剖面的形成,并增强了人为因素对土壤发育的作用。作为一个环境因素,后期魏氏微古生物学在高分类学水平上区分了土壤,这有助于形成复杂的土壤覆盖模式。

更新日期:2020-10-30
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