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Wyszukujesz frazę "fan delta" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Lacustrine deltas and subaqueous fans: almost the same, but different – a review
    Autorzy:
    Gruszka, Beata
    Zieliński, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1841622.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    fan delta
    Gilbert-type delta
    ice-contact subaqueous fan
    depositional mechanisms
    sedimentology
    delta
    mechanizmy depozycji
    sedymentologia
    Opis:
    Although deltas and subaqueous fans are both formed in the same near-shore zones of basins, the hydraulic conditions for their formation, development and sedimentary records are different. The present review discusses the results of previously published studies of fan deltas (Gilbert-type deltas) and subaqueous fans of lacustrine and glaciolacustrine environments. The depositional mechanisms of deltas and subaqueous fans, textural and structural features of the lithofacies associations and their typical lithofacies are presented. The characteristics of subaqueous fans, which are still relatively poorly understood and are often overlooked in sedimentological interpretations of lacustrine sedimentary successions, receive particular attention. The palaeoenvironmental and lithological differences between deltas and subaqueous fans are highlighted.
    Źródło:
    Geologos; 2021, 27, 1; 43-55
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Secular and catastrophic processes reflected in sediments of the Suchedniów water reservoir, Holy Cross Mountains (Poland)
    Autorzy:
    Przepióra, Paweł
    Kalicki, Tomasz
    Aksamit, Michał
    Biesaga, Piotr
    Frączek, Marcin
    Grzeszczyk, Paulina
    Malęga, Emanuela
    Chrabąszcz, Mariusz
    Kłusakiewicz, Edyta
    Kusztal, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/94610.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    sedimentology
    lacustrine sediments
    fan delta
    megaripples
    anthropogenic pond
    sedymentologia
    osady jeziorne
    delta
    staw antropogeniczny
    Opis:
    The Suchedniów water reservoir is located in the central section of the River Kamionka in the northern part of the Holy Cross Mountains of central Poland. This area once belonged to the Old Polish Industrial District that, during the Middle Ages, was very intensively developed by iron metallurgy. Many forges and mills along the rivers used water power, which led to the construction of an anthropogenic, small-scale water retention system. At the beginning of the twentieth century many of these reservoirs were drained after the collapse of metallurgical activities. The present-day reservoir was built in 1974 and drained in 2017. Research into the drained basin has documented various forms and sediments, some of which record present-day depositional processes (fire proof clay layer, inland fan delta), while others represent the historical period (lacustrine sediments of older reservoirs). Traces of catastrophic events have been preserved as well; an assemblage of megaripples marks the sudden drainage caused by a dam break in 1974.
    Źródło:
    Geologos; 2019, 25, 2; 139-152
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new etching trace from the Savignone Conglomerate (Oligocene), NW Italy, probably produced by limpet gastropods
    Autorzy:
    Uchman, A.
    Rattazzi, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/139401.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioerosion
    ichnotaxonomy
    fan delta
    borings
    attachment
    limpet gastropods
    bioerozja
    ichnotaksonomia
    ślimaki
    Gastropoda
    Opis:
    A new ichnogenus and ichnospecies (Solealites ovalis) of etching trace is preserved on the surfaces of clasts from the Savignone Conglomerate (Oligocene) in the Palaeogene Piemonte Basin in NW Italy. It is a shallow, oval depression with a central elevation, which was produced probably by limpet gastropods and served as their home scar, but other gastropods or even sea anemones are not excluded as the trace makers. The conglomerate is interpreted as a deposit of a fan delta, whose clasts have been bioeroded in an intertidal and shallow subtidal shore zone and redeposited to the deeper sea.
    Źródło:
    Acta Geologica Polonica; 2018, 68, 4; 651-662
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eustatic and tectonic control on late Eocene fan delta development (Orava Basin, Central Western Carpathians)
    Autorzy:
    Starek, D.
    Sliva, L’.
    Vojtko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058980.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Paleogene
    Orava
    Western Carpathians
    fan delta
    mass flow deposits
    coarse-grained delta
    Opis:
    The evolution of the Central Carpathian Paleogene Basin (CCPB) reflects an important role of relative sea level changes on a tectonically active basin margin. After the initial upper Lutetian/Bartonian transgression, the next regressive-transgressive cycle played a key role in a formation of the late Eocene fan delta facies associations in the southern Orava region of Northern Slovakia. Detailed sedimentary analysis allowed the separation of the following three facies associations which represent distinct depositional environments: alluvial fan (subaerial fan delta; Unit 1); subaqueous fan delta (Unit 2); and prodelta/slope and basin (Unit 3). The first stage of delta development is connected with eustatic sea level fall at the Bartonian/Priabonian boundary, accompanied by subaerial exposure, fluvial incision and deposition of alluvial fan sediments. Subaerial deposition was characterized by a variety of mass flow conglomerates with a red muddy matrix, interfingering with stream or sheetflood deposits. The next stage of the delta corresponds to high-amplitude transgression related to rapid tectonic subsidence along the CCPB margins during the Priabonian. The vertical arrangement of facies suggests retrograde delta development that shows rapid submergence of the subaerial parts and onlap of subaqueous mass flow conglomerates, often reworked by waves or wave-induced shallow-marine currents. Continuous deepening of the depositional environment during the late Priabonian/early Rupelian led to the relatively rapid superposition of prodelta/slope and basin facies associations by slowly accumulated hemipelagic deposis.
    Źródło:
    Geological Quarterly; 2012, 56, 1; 67-84
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
      Wyświetlanie 1-5 z 5

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