Эволюция гранулометрического состава крупнообломочного руслового аллювия от гор к равнинам

B. M. Osovetskiy

Аннотация


Рассматриваются основные показатели изменения гранулометрического состава крупнообломочного аллювия русловой фации при переходе от гор к равнинам. В полевых условиях проведены опробование и ситовой рассев отложений многих рек бывшего СССР. Использована дробная гранулометрическая шкала, проведено сравнение соответствующих генетических характеристик речных осадков (субраспределений, модальных классов и др.). Сделан вывод о том, что эволюция гранулометрического состава заключается в преобразовании полимодального распределения обломков, характерного для горного аллювия, в бимодальное, типичное для равнинного.


Ключевые слова


русловой аллювий; горные и равнинные реки; дробная шкала; эволюция грансостава

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Литература


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DOI: http://dx.doi.org/10.17072/psu.geol.19.4.359

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(c) 2020 B. M. Osovetskiy

URL лицензии: http://creativecommons.org/licenses/by/3.0/