Lithological and sedimentological characteristics of the alluvium of the sixth terrace of the Dniester river (Loyeva level) in the Torhanovychi 2 section

Yatsyshyn, Andriy; Bąbe, Maciej; Olszewska-Nejbert, Danuta; Bogucki, Andriy; Vas’kiv, S.

doi:10.30970/vgg.2013.41.2011

Visn. Lviv. Univ., Ser. Geogr.

2013

DOI: 10.30970/vgg.2013.41.2011

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Lithological and sedimentological characteristics of the alluvium of the sixth terrace of the Dniester river (Loyeva level) in the Torhanovychi 2 section

Andriy Yatsyshyn

Maciej Bąbe

Danuta Olszewska-Nejbert

et al.

Abstract: The main lithological characteristics of the alluvium of the sandy-gravelly bed of the sixth terrace of the Dniester river (Loyeva level) at environs of Sambir was analysed, in particular textural elements, granulometric and petrographic composition of the gravelly material (enclosing coarse sands, granules, pebbles, cobbles and boulders), its roundness, and the orientation of grains. The conditions of sedimentation of the studied alluvial sandy-gravelly bed of the sixth terrace of the Dniester river (Loyeva l… Show more

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Quaternary Palaeogeography at the Lviv University: Main Achievements in the Xxi Century and Prospects

Bogucki¹,

Tomeniuk

Yatsyshyn

et al. 2020

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The Department of Geomorphology and Palaeogeography of the Faculty of Geography at the Ivan Franko National University of Lviv employs a group of palaeogeographers (A. Bogucki, O. Tomeniuk, A. Yatsyshyn, R. Dmytruk), which comprehensively studies Quaternary sediments in Western Ukraine and other territories of the country. The thematic focus of palaeogeographic research is very diversified: the study of key sections of Quaternary sediments; conditions of formation and structure of periglacial loess-palaeosol sequences; research of the deposits of the glacial complex; periglacial processes and forms; the role of tectonics in the formation of Quaternary sediments; interdisciplinary research of the Palaeolithic; engineering and geological investigations; geophysical research; mineralogical research; weathering of anhydrite; study of the Holocene stage of the formation of the Dnister River valley; river terraces; lithology of alluvium; study of the Vyshnia River valley; malacological research; research of travertines, history of geography, etc. The selected issues are a priority research topic of the palaeogeographic group of the Department of Geomorphology and Palaeogeography. On the occasion of the 70th anniversary of the department, an attempt to summarize the scientific achievements of palaeogeographers over the past twenty years, particularly in thematic directions of research, was made. A large amount of new original factual material has been received, a significant number of international and Ukrainian scientific grants have been implemented, ten PhD students have defended their theses and received a PhD degree, more than 500 scientific papers have been published, more than half of which are in European Union languages. Due to the limited scope of this article, the greatest attention among all of the publications is paid to selected monographic works, collections of scientific papers prepared by researchers, papers in the journals from Scopus and Web of Science databases, and some others. It is worth mentioning the close cooperation of palaeogeographers of the Faculty of Geography with researchers from Ukraine, Poland, Belarus, Lithuania, France, Belgium and other countries. Without doubts, there are all the reasons to talk about a progressive palaeogeographic school at the Faculty of Geography, whose work is gaining momentum. Key words: palaeogeography; key sections; loess-palaeosol sequence; Quaternary period; periglacial processes; Palaeolithic.

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Quaternary Palaeogeography at the Lviv University: Main Achievements in the Xxi Century and Prospects

Bogucki¹,

Tomeniuk

Yatsyshyn

et al. 2020

gpc

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Lithological characteristics of moraine in Torhanovychi 2 section (Forecarpathians)

Yatsyshyn,

Bogucki,

Fedorko

2020

Visn. Lviv. Univ., Ser. Geogr.

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The main lithological characteristics of the moraine sediments discovered in the Torhanovychi 2 section are analysed. The capacity of the moraine is low (up to 35 cm), in the lower part it is built of the medium, fine-grained sands, and in the upper part, it is mostly coarse-grained. The sands are horizontally layered, and the capacity of the layers varies from 4–5 to 8 cm. The stratification is emphasized by the layered inclusion of coarse fragments, the maximum size of which (granite boulders) reaches 25 cm. Lithological analysis disclosed that the main component of the moraine is a sandy-clay material, the weight of which reaches 60% of the total mass of the sample. Almost a quarter (up to 24 %) is made of pebble and gravel material, and the remaining 16 % is formed by the hard gravel component of the moraine. The petrographic composition of coarse pebbles and gravel (100–40 mm) is represented by fragments of two types of sediments: light gray, gray Carpathian sandstones and pink granites, with a significant predominance of sandstone content. Granites are medium-rounded, and sandstones are medium and well-rounded. The petrographic structure of small pebbles and gravel (40–10 mm) is much more diverse and is represented by fragments of five types of sediments: Carpathian sandstones, silicites (Carpathian flints), siltstones, granites and quartzites. The most common are fragments of Carpathian origin: mainly medium-rounded light gray Carpathian sandstones and multi-coloured medium-rounded silicates. Their total part reaches 74,2 % of the total amount of fragments of the fraction. The second component is formed by erratics – pink, red, often very weathered granites with a variable shape and one well-rounded fragment of quartzite. The total part of erratics reaches 13,4 % of the total amount of fragments of the fraction. The least common in moraine are fragments of local sediments – light gray, gray, weakly cemented siltstones, as well as strong siltstones on siliceous cement with a conchoidal fracture. The total content of fragments of local sediments reaches 12,4 % of the total amount of fragments of the fraction. Medium-rounded siltstones predominate. The petrographic spectrum of hard gravel sediments is generally identical to the composition of small pebbles and gravel. They also contain fragments of five types of sediments: Carpathian sandstones, silicites (Carpathian flints), granites, siltstones and quartz. In addition, fragments of Carpathian-origin sediments also predominate here: medium-, well- and very well-rounded gray sandstones; multi-coloured silicites and milky white, gray quartz, etc. Key words: granulometric composition, petrographic composition, roundness, grain shape, Carpathian material, erratics, sandstones, silicites, siltstones, granites.

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Lithological and sedimentological characteristics of the alluvium of the sixth terrace of the Dniester river (Loyeva level) in the Torhanovychi 2 section

Cited by 2 publications

References 2 publications

Quaternary Palaeogeography at the Lviv University: Main Achievements in the Xxi Century and Prospects

Quaternary Palaeogeography at the Lviv University: Main Achievements in the Xxi Century and Prospects

Lithological characteristics of moraine in Torhanovychi 2 section (Forecarpathians)

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