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Wyszukujesz frazę "alluvial fan" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Foreland provenance of thick conglomerates in the early stage of the Carpathian Foredeep development : the case of the Sloboda Conglomerate (Lower Miocene), western Ukraine
Autorzy:
Oszczypko, N.
Uchman, A.
Bubniak, I.
Powiązania:
https://bibliotekanauki.pl/articles/2060509.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
molasse
forebulge
alluvial fan
fan delta
Boryslav-Pokuttya Nappe
Ukraine
Opis:
The upper part of the Lower Miocene Sloboda Conglomerate, a 250–1400 m thick unit, was deposited mainly on an alluvial fan and fan delta during the early stages of Carpathian Foredeep development. During of the Old Styrian overthrust movements of the Carpathian orogen, a forebulge was formed, which supplied clasts to the conglomerate. The clasts are dominated by Late Proterozoic–Early Cambrian phyllites, while Paleozoic carbonates are common, and Mesozoic and other rocks are rare. The source area formed mainly by a prolongation of the Małopolska Massif that was involved in the forebulge; this was located close to a palaeovalley cut into Mesozoic and Paleozoic rocks, buried under younger strata. Additional material was derived from the advancing front of the Carpathian Flysch nappes.
Źródło:
Geological Quarterly; 2012, 56, 4; 789--802
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aluwialne wypełnienie doliny oraz stożek napływowy na terasie zalewowej Prosny w Kościelnej Wsi (koło Kalisza) : zmienność litofacjalna i antropogeniczne uwarunkowania
Autorzy:
Hildebrandt-Radke, I.
Powiązania:
https://bibliotekanauki.pl/articles/295272.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
alluvial fan
floodplain terrace
Prosna valley
prehistoric settlements
Holocene
Opis:
The sediment study of the alluvial bottom of Prosna river valley and of alluvial fan in the floodplain terrace, with the special attention paid to its origins, anthropogenic conditions at that time and also to lithofacial variability, enabled to draw the following conclusions. The fan was the result of erosion-denudation processes triggered after 6220š140 BP (Gd-4677) (about 4300 BC). The beginning of these processes can be associated with the Neolithic human beings activity, having taken into account conditions of the Holocene Climatic Optimum as well as presence of Neolithic cultures found in the investigated area. The lithofacial analysis of the sediments has revealed a simple fractionation sequence: D right arrow B right arrow C right arrow A for the alluvial filling of the river bottom. This indicates its accumulation as the result of meandering river activity. Cyclical lithofacies transitions for the alluvial fan sediments have been observed: A (sandy) into F (sandy-silty) and into E (silty).
Źródło:
Landform Analysis; 2011, 16; 64-68
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a fore-mountain alluvial fan of the Olza River (southern Poland) during the Pleistocene
Autorzy:
Salamon, T.
Wójcik, A.
Powiązania:
https://bibliotekanauki.pl/articles/191976.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
fore-mountain alluvial fan
sedimentology
Pleistocene
Kończyce section
southern Poland
Opis:
A series of Pleistocene deposits with different lithology is present where the Olza River flows out from the Carpathian foothills to the Oświęcim Basin. The deposits are mostly composed of gravels forming several series of different ages, which are intercalated with much finer silts and sands as well as organic silts. A complex of glaciogenic deposits is also found as a thin layer of till, glaciolacustrine and glaciofluvial sediments. Loess-like deposits occur in the top part of the section under study. Gravels were deposited in the zone of a fore-mountain fan. The co-occurrence of lithologically different deposits reflects a great variability of sedimentation conditions, which depended mostly on climate changes. However, the formation of fan was also controlled by other factors. Neotectonic movements probably played an important role in its evolution. In this paper, we describe the successive stages of fan development and the factors determining this process. The interpretation is based on the analysis of deposits exposed in the eastern part of the fan, at the Kończyce site. The fan of the Olza River was built up with alluvia mostly during successive glaciations. It was dissected towards the end of each glaciation. During interglacials the fan was only slightly transformed. A special period of fan development occurred during glaciation when the ice sheet advanced on the fan surface. The aggradation of the fan was probably stopped due to uplift of the area. Then, aeolian loess-like deposits started to accumulate on a considerable part of the fan surface. Former opinions about the stratigraphy of the fan deposits are strongly diversified. Precise age of the successive series is still difficult to establish. In the light of contemporary studies, it can not be excluded that age of the Olza fan might be younger than previously suggested .
Źródło:
Annales Societatis Geologorum Poloniae; 2010, 80, No 1; 39-52
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The sedimentary environment of Devonian siliciclastics in the Babí lom locality (Brunovistulian Platform cover, Southern Moravia, Czech Republic)
Autorzy:
Wojewoda, J.
Nehyba, S.
Gilíkova, H.
Burianek, D
Powiązania:
https://bibliotekanauki.pl/articles/2059824.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
southern Moravia
Brno Massif
Devonian siliciclastics
facies analysis
heavy minerals
alluvial fan
braided river
meandering river
palaeotransport
Opis:
Sandstones and conglomerates, which northwards of Brno agglomeration build a hill (ridge) named Babí lom are strongly diagenezed (anchi-metamorphozed) and tectonically deformed. Their regional distribution and stratigraphic position between the Cambrian(?) clastics and Upper Devonian limestones, as well as their appearance meant that they age is considering as Middle Devonian. They are distinguished as the so-called „Basal Devonian Clastics“. Almost all primary sedimentary features are well preserved and distinct. In the metasediments of the Babí lom hill were distinguished both the facies and structures typical of alluvial fans and rivers. Among others they are channel lags with imbricated grains, cross beddings and debrites. Within sedimentary association was established the way-up direction what clearly evidences a coarsening upwards sequence. Assuming the lack of rotation of series of sediments in the X-Y plane, the palaeotrasport was toward the north while major supply with material was from the east.
Źródło:
Geological Quarterly; 2015, 59, 1; 229--238
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Field trip in the semi-arid Gujarat Alluvial Plain : report
Autorzy:
Gębica, P.
Wachecka-Kotkowska, L.
Kotkowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/294927.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
bajada
piedmont fan
Gujarat Alluvial Plain
Narmada River
India
Gudźarat
Narmada
Indie
Opis:
This report contains short information about the geomorphological field trip in the Gujarat Alluvial Plain. During the field trip the issues of fluvial landform and alluvial deposits of the rivers were discussed: Sabarmathi River, Mahi River, Narmada River and Karjan River. Particular attention was paid to the relief and geological structure of the Gujarat Alluvial Plain, dissected by the valleys of several rivers. The role of tectonics, sea level fluctuations and climate changes and their influence on the course of fluvial, aeolian and sea accumulation in the lower sections of river valleys was emphasized.
Źródło:
Landform Analysis; 2017, 35; 17-20
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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