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Wyświetlanie 1-5 z 5
Tytuł:
Rozwój wybrzeża mierzejowego we wschodniej części Zatoki Pomorskiej
Development of the barrier coast in the eastern part of Pomeranian Bay
Autorzy:
Sydor, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2076128.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
wybrzeże mierzejowe
Zatoka Pomorska
zmiany poziomu morza
paleogeografia
barrier coast
Pomeranian Bay
sea-level changes
palaeogeography
Opis:
The studies were conducted on the barrier coast located in the eastern part of Pomeranian Bay. The main study goal was to present the development of the barrier coast between Niechorze and Kołobrzeg, with particular emphasis on the impact of sea level changes in the Baltic Sea. Based on collected data, three basic groups of deposits were identified in the study area: barrier basement deposits, barrier deposits, and Rega River outlet cone deposits. To recreate the barrier development stages, sea level changes in the eastern part of Pomeranian Bay for the last 8,500years were reconstructed. At that time, the coast migrated to the south. The first barriers in the study area appeared around 7,500years b2k. The main factors conditioning the barrier coast development in were climate changes, sea level changes, barrier basement morphology and lithology, as well as the amount of supplied sedimentary material. The reconstructed stages of barrier development show that there are sections of different barrier types (landward-migrating to accreted barrier, landward-migrating barrier through accreted barrier to landward-migrating barrier, landward-migrating barrier) in the study area.
Źródło:
Przegląd Geologiczny; 2021, 69, 1; 21--32
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Baltic Sea coastal erosion; a case study from the Jastrzębia Góra region
Autorzy:
Uścinowicz, G.
Kramarska, R.
Kaulbarsz, D.
Jurys, L.
Frydel, J.
Przezdziecki, P.
Jegliński, W.
Powiązania:
https://bibliotekanauki.pl/articles/94521.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
barrier and cliff coast
coastal landslides
coastal erosion
coastal protection
southern Baltic Sea
wybrzeże klifowe
osuwiska
erozja wybrzeża
ochrona wybrzeża
południowe Morze Bałtyckie
Opis:
The coastline in the Jastrzębia Góra area can be divided into three major zones of general importance: a beach and barrier section, a cliff section, and a section protected by a heavy hydrotechnical construction. These areas are characterised by a diverse geology and origin, and hence different vulnerability to erosion. In addition, observations have demonstrated a different pace of erosion within each zone. Based on the results obtained by remote sensing methods (analysis of aerial photographs and maps), it has been determined that the coastline in the barrier area, i.e., to the west of Jastrzębia Góra, moved landwards by about 130 m, in a period of 100 years, and 80 m over about 50 years. A smaller displacement of the shoreline could be observed within the cliff. Between the middle of the twentieth and the start of the twenty-first centuries the shore retreated by about 25 m. However, in recent years, an active landslide has led to the displacement of the uppermost part of the cliff locally up to 25 m. Another issue is, functioning since 2000, a heavy hydrotechnical construction which has been built in order to protect the most active part of the cliff. The construction is not stable and its western part, over a distance of 50 m, has moved almost 2 m vertically downwards and c. 2.5 m horizontally towards the sea in the past two years. This illustrates that the erosional factor does not comprise only marine abrasion, but also involves land-based processes determined by geology and hydrogeology. Changes in the shoreline at the beach and barrier part are constantly conditioned by rising sea levels, the slightly sloping profile of the sea floor and low elevation values of the backshore and dune areas. Cliffs are destroyed by mass wasting and repetitive storm surges that are responsible for the removal of the colluvium which protects the coast from adverse wave effects. Presumably, mass movements combined with groundwater outflow from the cliff, plus sea abrasion cause destabilisation of the cliff protection construction.
Źródło:
Geologos; 2014, 20, 4; 259-268
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Postglacial to Holocene sedimentation history and palaeogeographical development of a barrier spit (Pudagla lowland, Usedom island, SW Baltic coast)
Autorzy:
Hoffmann, G.
Powiązania:
https://bibliotekanauki.pl/articles/1187371.pdf
Data publikacji:
2004
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
sea level
barrier spit
palaeogeography
Holocene
Usedom
Baltic coast
Opis:
Pudagla lowland is a Holocene barrier spit on the SW Baltic coast. Framed and underlain by Pleistocene deposits, the depression is filled up with up to 20 m of Late Glacial to Holocene sediments. 63 cores were collected using a vibrocore technique. Samples were analysed in terms of granulometry, species associations (molluscs, ostracods). Organic sediments (peat) were used for radiocarbon dating. In total 6 new 14C-data are presented. The sediment sequence starts with a Late Glacial till, overlain by glaciofluvial sand. A lake developed during the Late Preboreal/Early Boreal with a water level of -8 m mean sea level (m.s.l.) with sand the predominant sediment. Minor lakes existed during the Boreal. At around 6500 BP the Littorina transgression reached the study area. Mud and fine to medium sand were deposited forming a barrier spit. At around 1000 BP, the entire Pudagla lowland became terrestrial with peat as the most common surface sediment. Palaeogeographical development is demonstrated by nine evolutionary stages. The assumption of Kliewe, Janke (1982) that the transgression onset varies regionally at the coast of the southern Baltic Sea can be proven by comparison with other areas which have been subject to prior investigations.
Źródło:
Polish Geological Institute Special Papers; 2004, 11; 83-90
1507-9791
Pojawia się w:
Polish Geological Institute Special Papers
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coastal dunes of the Baltic Sea shores: a review
Autorzy:
Łabuz, Tomasz Arkadiusz
Grunewald, Ralf
Bobykina, Valentina
Chubarenko, Boris
Česnulevičius, Algimantas
Bautrėnas, Artūras
Morkūnaitė, Regina
Tõnisson, Hannes
Powiązania:
https://bibliotekanauki.pl/articles/1051573.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
coastal dunes
dune relief
barrier types
dune distribution
Baltic Sea coast
Opis:
The article summarises results of studies conducted along the Baltic Sea sandy coasts by scientists involved in coastal dune research, and presents an attempt to describe the types and distribution of dune coasts. The Baltic Sea coasts feature lower and higher foredunes. The lowland behind the coastal dune belt is covered by wandering or stabilised inland dunes – transgressive forms, mainly parabolic or barchans. The source of sediment for dune development includes fluvioglacial sands from eroded coasts, river-discharged sand, and older eroded dunes. Due to the ongoing erosion and coastal retreat, many dunes have been eroded, and some are withdrawing onto the adjacent land. There are visible differences between the south-eastern, western, and northern parts of the Baltic Sea coast with respect to dune development. The entire southern and eastern coast abounds in sand, so the coastal dunes are large, formerly or currently wandering formations. The only shifting dunes are found at the Polish and the Russian–Lithuanian coasts on the Łebsko Lake Sandbar as well as on the Vistula and Curonian Spits. The very diverse shoreline of the south-western coast experiences a scarcity of larger sandy formations. Substantial parts of the Baltic Sea sandy coasts have been eroded or transformed by humans. The northern part of the Baltic Sea coast features mainly narrow and low sandy coasts (e.g. in Estonia). Further north, sandy dunes are virtually absent.
Źródło:
Quaestiones Geographicae; 2018, 37, 1; 47-71
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stages of the formation of the Łeba barrier-lagoon system on the basis of the geological cross-section near Rąbka (Southern Baltic Coast, Poland)
Autorzy:
Rotnicki, Karol
Alexandrowicz, Stefan W.
Pazdur, Anna
Goslar, Tomasz
Borówka, Ryszard K.
Powiązania:
https://bibliotekanauki.pl/articles/2026416.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sand barriers
lagoons
Holocene barrier- lagoon system
Polska
southern Baltic coast
Opis:
The ar ti cle pres ents the re sults of a de tailed study of the geo log i cal struc ture of the £eba Bar rier in the R¹bka crosssec tion (South ern Bal tic, Po land). The bar rier sep a rates Lake £ebsko from the Bal tic. Five sed i men tary com plexes were dis tin guished there (M2–M6). The spa tial vari abil ity of the grain-size dis tri bu tion was ex am ined and suc ces sion stages of the mol lusc fauna oc cur ring in the in di vid ual sed i men tary com plexes were dis tin guished. Ra dio car bon dating was used to es tab lish the age of the most im por tant events dur ing the pro cess of for ma tion of the bar rier, which took place in the course of sev eral rel a tive sea-level changes. The first sed i men tary com plex (M2) at R¹bka is connected with the sec ond ingression (i2) of the Bal tic Sea (ca. 6,700–6,000 14C years BP), sea-level sta bi li za tion (6,000–5,500 14C years BP), and at last sea-level low er ing (5,500–5,000 14C years BP) in the re gion of the Gardno-£eba Coastal Plain. The sed i men tary com plex M3 de vel oped in a la goonal en vi ron ment when the bar rier was sit u ated north of its pres ent po si tion (5,000–3,000 14C BP). The next low er ing of the sea-level made the la goon shal lower and caused the emer gence of small but al ready subaerial stretches of bar rier land with a fresh wa ter fauna in the north (4,880±40 14C BP). With the next ingression stage (i3), which took place be tween 4,500 and 3,000 BP, the bar rier shifted to its pres ent-day po si tion and the la goon changed into a fresh wa ter lake. From 3,000 to 1,700 14C BP fos sil soil and peats de vel oped on the bar rier sur face as a re sult of an other sea-level low er ing. The last ingression stages (i4 and i5), youn - ger than 1,700 BP, built up the bar rier, prac ti cally in its to day’s lo ca tion (sed i men tary com plexes M4 and M5). The youn gest sed i men tary com plex (M-6) is rep re sented by pres ent-day beach sands.
Źródło:
Studia Quaternaria; 2009, 26; 3-24
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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