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    Wyświetlanie 1-4 z 4
    Tytuł:
    Phases of aeolian accumulation on the Vistula Spit (Southern Baltic Sea) in the light of TL dating and analysis of a digital elevation model
    Autorzy:
    Fedorowicz, S.
    Wysiecka, G.
    Zieliński, P.
    Hołub, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059003.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Southern Baltic
    Vistula Spit
    Holocene
    dune ridges
    TL dating
    DEM
    Opis:
    The genesis of the Vistula Spit (Southern Baltic Sea) in the Postlitorina period is regarded as occurring by gradual addition of successive dune ridges along the entire length of the form. Based on the degree of soil profile development and radiocarbon dating of organic sediments three main stages of aeolian processes are usually recognized. GIS analysis of a digital elevation model (DEM) and thermoluminescence dating of dune sand supports the model of progressive development of dune ridges, and has identified four periods of intense aeolian activity. These were established 5860–5400, 1930–1610, 1200–900 years ago from the present, and from 500 years ago.
    Źródło:
    Geological Quarterly; 2012, 56, 2; 345-352
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Black sand properties in beach-dune system, Patea Beach, North Island, New Zealand
    Autorzy:
    Dłużewski, Maciej
    Hilton, Mike
    Muszyński, Andrzej
    Rotnicka, Joanna
    Woronko, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/2060113.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    titanomagnetite
    black sand
    beach-dune deposits
    grain size distribution
    grain shape
    microtexture
    aeolian sorting
    Opis:
    The study focuses on sand grain properties in different parts of a beach-dune system built entirely of heavy mineral particles. These properties are related to: (1) resistance of particular minerals to weathering and abrasion, (2) hydraulic sorting in the swash zone, and (3) aeolian sorting during grain transport inland from the upper beach. The main waterlain and windlain sand properties depend on settling velocity which results from grain density (reflecting grain mineralogy), size, shape and roundness. The study was performed on the beach and dunes at Patea on the west coast of the North Island of New Zealand, which are comprised of heavy minerals assemblage containing a ferromagnetic (dominated by titanomagnetite) and non-ferromagnetic (mainly pyroxene and amphibole) fractions. The result demonstrates that three zones of different sand properties can be distinguished: (1) a lower swash zone dominated by non-ferromagnetic, larger and more angular particles which are carried back from the upper swash zone down the foreshore by the backwash; (2) an uppermost swash zone and beach with almost 100% of ferromagnetic, smaller and more rounded particles deposited at the back of the beach by the uprush, which during high tide and storms can reach the cliff toe, and can be reworked by wind; and (3) a climbing dune composed of a more poorly sorted mixture of non- and ferromagnetic particles. In terms of both mineralogy and grain size and shape, the dune sand is less uniform than the beach sand. Aeolian segregation resulted here in sand textural features opposite to those found in dune sands composed of light minerals. The results highlight the density-dependent variability of grain size and shape of beach-dune deposits consisting of only heavy minerals, and broaden our understanding of mechanisms of sedimentary processes which is particularly important when reconstructing older sedimentary successions.
    Źródło:
    Geological Quarterly; 2021, 65, 3; 65: 35
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The results of integrated investigations of the Lithuanian coast of the Baltic Sea : geology, geomorphology, dynamics and human impact
    Autorzy:
    Bitinas, A.
    Žaromskis, R.
    Gulbinskas, S.
    Damušyte, A.
    Žilinskas, G.
    Jarmalavičius, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060624.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Bałtyk
    geologia
    geomorfologia
    wydma
    osad denny
    Baltic Sea
    geology
    geomorphology
    dune
    bottom sediments
    coastal dynamics
    human impact
    Opis:
    Integrated investigations of the Lithuanian coast of the Baltic Sea were carried out in 1999-2004 in order to satisfy an increased demand for information about the shoreline. The area of investigations included the beach and the protective dune or cliff (i.e. an onshore belt 100-300 mwide) and reached 15-20 misobaths in the offshore region. This study has resulted in the Geological Atlas of the Lithuanian coast of the Baltic Sea, which consists of digital maps including a geological-geomorphological map, a map of anthropogenic load at a scale of 1:5000 and an explanatory note. Data arrays from shoreline geodynamic monitoring and from field and analytical studies as well as descriptions of borehole sections are provided in graphic and textual annexes. On basis of these investigations 92 morpholithological profiles of the offshore zone and 101 geological cross-sections of the onshore zone were prepared. The basic geological information in the form of maps and special data arrays allows assessment of the current geological condition of the Baltic Sea shores and enables forecasts for their development. It also can be used for environmental protection and land use in the shoreline area: prevention of erosion, designing of protected, recreation and urban areas, as well as substantiation and development of a seashore monitoring system.
    Źródło:
    Geological Quarterly; 2005, 49, 4; 355--362
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wyniki badań geologicznych i archeologicznych na stanowisku Huta Radoryska 1 (Polska południowo-wschodnia)
    The results of geological and archaeological investigation on the Huta Radoryska 1 site (SE Poland
    Autorzy:
    Żarski, M.
    Przeździecki, M.
    Przasnyska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074466.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Huta Radoryska
    stratygrafia
    zabytek archeologiczny
    badania litologiczne
    wydma
    dune
    archaeological site
    stratigraphy
    Younger Dryas
    Holocene
    Mesolithic
    flint artefacts
    Opis:
    The flint material found in 2001 on the dune surface at Huta Radoryska in South-Podlasian Lowland near Żelechów is associated with human activity. The dune is located at Mała Bystrzyca depression. This depression, filled with the Wartanian silts, Eemian, Vistulian sands and Holocene peats, was formed after dead ice had thawed during deglaciation of the Wartanian ice sheet. The dune is built from eolian sands, mainly accumulated in the Late Vistulian (the Younger Dryas). The palaeosol (podsolic), formed in the Atlantic Period, occurs in the upper part of the dune. There were flints (344) pieces within humus horizon A1 of this palaeosol and above it. Flint cores and tools were recognised among flints. Most of the artefacts were connected with the Mesolithic (the Komornica and Chojnice-Pieńki Culture). Few Late Palaeolithic and Bronze Age flint artefacts were also found. Human activity have lasted for over 10 thousand years on this dune.
    Źródło:
    Przegląd Geologiczny; 2006, 54, 3; 238-244
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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