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Tytuł:
Late Holocene water-level changes in Lake Iso Lehmälampi, Southern Finland, reflected in subfossil Cladocerans and Chironomids
Autorzy:
Nevalainen, Liisa
Luoto, Tomi P.
Sarmaja- Korjonen, Kaarina
Powiązania:
https://bibliotekanauki.pl/articles/2026067.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Chironomidae
Cladocera
climate
Finland
late Holocene
lake-level changes
Opis:
Anal y ses of subfossil cladocerans (Crustacea: Cladocera) and chi rono mids (Diptera: Chironomidae) were ap plied to ex am ine wa ter-level changes in a small and oligotrophic lake in south ern Fin land over the past 2000 years. Ma jor changes in the in ver te brate com mu ni ties oc curred ca. 400 AD on wards when the lit to ral cladoceran Alonella nana started to re place the plank tonic Eubosmina as the dom i nant spe cies and chi rono mids Psectrocladius sordidellus group and Zalutschia zalutschicola in creased. These changes were most likely due to a de creas ing wa ter level and an en larg ing pro por tion of the lit to ral area, pro vid ing suit able veg e ta tive hab i tats, e.g. aquatic bryophytes (mosses), for these taxa. The low er ing wa ter level reached its min i mum just be fore the Me di eval Warm Pe riod, ca. 800–1000 AD, af ter which the lake level rose again and re mained high un til mod ern times. A prom i nent change in the chi rono mid as - sem blages oc curred dur ing the 20th cen tury when Ablabesmyia monilis and Chironomus anthracinus type in creased, pre sum ably due to changes in wa ter chem is try, caused by anthropogenic load of pol lut ants.
Źródło:
Studia Quaternaria; 2008, 25; 33-42
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molluscan assemblages in Late Holocene deposits in Busko-Zdrój (Nida Basin, Southern Poland)
Autorzy:
Alexandrowicz, W. P.
Gołas-Siarzewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/184670.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
malacofauna
peat bog
late Holocene
Nida Basin
South Poland
Opis:
Late Holocene deposits containing abundant and well-preserved malacofauna were exposed within the Spa Park in Busko-Zdrój. Molluscan shells were found in sand, dark muds and calcareous muds. Dark and calcareous muds are intercalated by fine-grained sand and peat devoid of malacofauna. Ali these deposits were accumulated on swampy, flat bottom of wide river valley. The result of radiocarbon dating has shown that the formation of the deposits started in the upper part of the Subboreal Phase. Numerous Late Medieval portery shards were found in several topmost profile sections. The identified malacofauna suggests that similar climatic and habitat conditions prevailed throughout the entire sedimentation period. Snails typical of open habitats, accompanied by hygrophilous taxa, play a dominant role. Mesophilous and aquatic taxa occur in accessory proportions, while shadow-loving forms are virtually absent.
Źródło:
Geology, Geophysics and Environment; 2013, 39, 1; 5-19
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Malacofauna in cave deposits of the Udorka valley (Krakow-Czestochowa Upland)
Autorzy:
Szymanek, M.
Krajcarz, M.T.
Krajcarz, M.
Sudol, M.
Powiązania:
https://bibliotekanauki.pl/articles/84684.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
malacofauna
cave deposit
locality
Holocene
Middle Holocene
Late Holocene
Udorka valley
Krakow-Czestochowa Upland
Źródło:
Folia Malacologica; 2016, 24, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Record of environmental changes and fluvial phases in the Late Holocene within the area of Podhale (the Carpathians, southern Poland) : studies in the Falsztyński valley
Autorzy:
Alexandrowicz, Witold Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2058641.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
environmental changes
molluscs
flood phases
Late Holocene
Podhale Basin
Southern Poland
Opis:
The Falsztyński valley, in the eastern part of Podhale, Poland includes a low terrace spanning the stream channel, the structure of which has been studied in nine profiles. Five gravel levels and five mud levels with plant and abundant mollusc remains are described, temporally constrained by ten radiocarbon dates. The terrace deposits represent the terminal part of the Atlantic Phase and all of the Late Holocene. The mollusc analysis helped identify phases of environmental change, notably one in the Middle Ages connected with intensive settlement activities in the area of Podhale. These include deforestation, affecting mollusc communities with replacement of forest assemblages by open-country species. The gravel levels records increased fluvial activity periods correlated with humid climate phases. It is possible to distinguish five such periods corresponding to the transition of the Atlantic and Subboreal phases, the middle part of the Subboreal Phase, the transition of the Subboreal and Subatlantic phases, the younger part of the Subatlantic Phase, and the last 200 years. These correspond to the periods of increased fluvial activity in the valleys of other Carpathian rivers.
Źródło:
Geological Quarterly; 2019, 63, 4; 629--642
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Holocene tufa in the Slovak Karst : facies, sedimentary environments and depositional history
Autorzy:
Gradziński, M.
Hercman, H.
Jaśkiewicz, M.
Szczurek, S.
Powiązania:
https://bibliotekanauki.pl/articles/2060325.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fluvial tufa
perched spingline tufa
radiocarbon dating
Quaternary
late Holocene tufa decline
Central Carpathians
Opis:
Several tufa complexes are known in the Slovak Karst which is a typical karst area of a temperate climate. This area is built of Mesozoic carbonates, mainly Triassic in age. The karst systems drain carbonate plateaux and lead water to resurgences located in valleys which are up to 300 m deep. Below the resurgences there are Holocene fossil tufa deposits that exceed 12 m in thickness. The tufas include stromatolite, moss, phytoclastic, oncoidal, and intraclastic facies. Extensive barrages which once dammed the upper reaches of the streams were formed in narrow valleys. They are composed predominantly of moss facies and stromatolites, with subordinate oncoidal and phytoclastic facies. Phytoclastic, oncoidal and intraclastic facies are dominant in dammed segments of streams, and include gastropod shells and charcoal fragments. Some small moss cushions are also developed. Barrages and dammed areas formed in a longitudinal fluvial depositional system. Conversely, below resurgences located on plateau slopes tufas of a perched springline depositional system were formed. These comprise deposits of prograding cascades constructed by moss, phytoclastic and stromatolitic facies. Presently, the tufas analysed are inactive. They stopped growing in the Late Holocene time, after which there was abrupt incision of the streams. This caused downcutting into Holocene tufas, in some places reaching Mesozoic bedrock. At present tufa is being precipitated from streams in all the sites studied.
Źródło:
Geological Quarterly; 2013, 57, 4; 769--788
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Malakofauna i fazy rozwoju osuwiska w Tylce kolo Krościenka (Pieniny)
Malacofauna and phases of development of landslide in Tylka near Krościenko (Pieniny Mts)
Autorzy:
Alexandrowicz, W. P.
Powiązania:
https://bibliotekanauki.pl/articles/183441.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
osuwiska
malakofauna
datowanie radiowęglowe
późny holocen
Pieniny
landslides
malacofauna radiocarbon dating
late Holocene
Pieniny Mts.
Opis:
The landslide is ranking on western slope of the White Stream valley. Two colluvial barrier and accompanied them dammed-lakes have been formed. Deposits filling these lakes contains rich molluscan communities. Additionally the occurrence of plant remains allowed to dating deposits using radiocarbon method. These data make possible to reconstruction of the history of this landslide during Late Holocene.
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 2/1; 69-75
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tree stumps from the bottom of the Vistula Lagoon as indicators of water level changes in the Southern Baltic during the Late Holocene
Autorzy:
Leczynski, L.
Miotk-Szpiganowicz, G.
Zachowicz, J.
Uscinowicz, S.
Krapiec, M.
Powiązania:
https://bibliotekanauki.pl/articles/47624.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
tree stump
bottom
palynological analysis
Vistula Lagoon
Baltic Sea
Gdansk Gulf
water level change
Late Holocene
Opis:
The Vistula Lagoon is situated along the south-eastern shore of the Gulf of Gdańsk and is linked with the gulf through the Strait of Baltiysk. Separated from the open sea by the Vistula Spit, the Vistula Lagoon is a shallow body of water with a mean depth of 3 m; the bottom is covered with a layer of mud several metres thick. This article presents a unique, newly discovered locality of tree stumps occurring in situ at the bottom of the Vistula Lagoon. The radiocarbon age of the alder stumps and the top of the peat in which they are rooted is Subboreal. The alder wood was dated to 4770±35 and 3295±35 years BP. The top layers of peat were dated to 4670±40, 4410±35 and 3690±35 years BP. The considerable scatter of the dates indicates the significance of erosional processes during marine transgressions. Radiocarbon dates and pollen analyses indicate that in the late Atlantic – early Subboreal periods, the water level of the Vistula Lagoon was about 3 m lower than it is today. The −2 m level was passed no earlier than c. 3500 years ago; the −1 m level was reached around 2000 years ago.
Źródło:
Oceanologia; 2007, 49, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eco-biostratigraphic advances in late Quaternary geochronology and palaeoclimate : the marginal Gulf of Mexico analogue
Autorzy:
Antonarakou, Assimina
Kontakiotis, George
Karageorgis, Aristomenis P.
Besiou, Eva
Zarkogiannis, Stergios
Drinia, Hara
Mortyn, Graham P.
Tripsanas, Efthymis
Powiązania:
https://bibliotekanauki.pl/articles/2058605.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
integrated stratigraphy
Late Glacial-Holocene transition
planktonic foraminiferal eco-bioevents
deep-sea sedimentary correlations
climate variability
palaeoceanography
Opis:
This study combines high-resolution planktonic foraminiferal eco-biostratigraphy and palaeoclimatic data from the high-sedimentation-rate core J PC-26 from the northwestern margin of the Gulf of Mexico (GoM). The eco-biozones recognized (GOMPFE1-12) being correlated with published Mg/Ca-based sea surface temperatures. This updated palaeoclimatic and stratigraphic reference record facilitates correlations with the Greenland ice core events and their climatic relationships, and also provides a solid stratigraphic framework for correlations with other palaeoclimatic and palaeoceanographic records in the circum-GOM/Caribbean region. This multidisciplinary approach underlines the utility of supporting conventional dating methodologies with different constraints, and further reveals a powerful tool for reliably correlating marine records between comparable deep-sea marginal settings and coeval sequences of this region.
Źródło:
Geological Quarterly; 2019, 63, 1; 178--191
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Historia zlodowacenia archipelagu Svalbard od późnego vistulianu do współczesności
Autorzy:
Ćwiąkała, Joanna
Moskalik, Mateusz
Rodzik, Jan
Zagórski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/763206.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Late Vistulian and Holocene stratigraphy, Svalbard glaciation
stratygrafia późnego vistulianu i holocenu, zlodowacenia Svalbardu
Opis:
The glacial history of the Svalbard archipelago is often a hot topic for researches, but the articles usually refer to a particular piece of Svalbard. The authors of this work studied many scientific articles based on the researches to find and collect this history.Svalbard archipelago is located in the Arctic, at the edge of the continental shelf of Europe. The end of shelf boundary noted occurrence of ice caps in the past glaciations. In turn, the main elements of the landscape of the archipelago are glaciers that are currently in a recession. Spitsbergen (the biggest island of the archipelago) sets the limit of Pleistocene glaciations, and the current state of glaciers allows determining the place where the recession is intense.The main aim of the authors in this study is to show this history only from the late Vistulian to the late Holocene (the beginning of 21st century). Interstadials and Stadials start time varies, as their duration in different places, according to various authors. It is very hard to collect all information and describe this history. By knowing the history of glaciation, we can distinguish in the late Vistulian: Last Glacial Maximum (LGM), Bølling/Older Dryas/Allerød and Younger Dryas (YD). LGM was the stadial in which was the maximum extent of ice sheet in late Vistulian. After this period, ice sheet began to retreat from the continental shelf. In turn, YD was the stadial in which the last advance of glaciers took place, about 11 000 years BC. In the Holocene we can distinguish Holocene Climatic Optimum (in the meantime short Cooling Holocene), Revdalen Stadial, Medieval Warm Period, Little Ice Age (LIA) and 20th century warming. The maximum extent of glaciers in Holocene was in LIA. In LIA, the extent of glaciers was bigger than in YD. In 20th century a warming started and continues until now.
Svalbard jest obszarem, gdzie zachowały się w różnym stopniu „ślady” zdarzeń glacjalnych. Dowodami ich wystąpienia są między innymi osady oraz formy glacjalne i fluwioglacjalne (np. Boulton 1979; Boulton i in. 1982; Landvik i in. 1998; Mangerud i in. 1998; Pękala, Repelewska-Pękalowa 1990; Lindner, Marks 1993ab; Ingólfsson, Landvik 2013). Bliskość tego obszaru w stosunku do centrów zlodowaceń powodowała, że kolejne epizody glacjalne „zamazywały ślady” poprzednich, niszcząc je lub przekształcając (np. Landvik i in. 1992; Mangerud i in. 1998; Zagórski 2007). Po deglacjacji następował zazwyczaj okres intensyfikacji działania procesów nieglacjalnych (paraglacjalnych), np. morskich, peryglacjalnych (Mercier, Laffly 2005; Strzelecki 2011; Zagórski i in. 2012). Stąd najlepiej zachowały się pozostałości najmłodszych zdarzeń i epizodów glacjalnych, np. małej epoki lodowej (np. Baranowski 1977abc; Lindner Marks 1993b; Werner 1993; Wójcik, Ziaja 1999; Reder 1996ab;  Birkenmajer, Łuczkowska 1997; Svendsen Mangerud 1997; Zagórski i in. 2008, 2012; Rodzik i in. 2013).
Źródło:
Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia; 2014, 69, 2
0137-1983
Pojawia się w:
Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrological changes in the Lublin Polesie during the Late Glacial and Holocene as reflected in the sequences oflacustrine and mire sediments
Autorzy:
Bałaga, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/2027411.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Lublin Polesie
Late Glacial
Holocene
hydrological changes
pollen analysis
Opis:
The paleoecological research of biogenie sediments sampled in the different lake-mire ecosystems of the Łęczna Włodawa Lake District were the basis of studies on hydrological changes during the Late Glacial and Holocene. The lithological differentiation (spatial and temporal) of lacustrine and mire sediments in the studied sites indicates that the hydrological changes were of local nature. The investigations also evidence a specific functioning of the lakes in this region. Lake basins were formed as a result of the ground ice degradation and the transformation of groundwater circulation in the Late Glacial. The total area of lakes in the Lake District was the largest from the Younger Dryas to the Subboreal chronozone. The gradual lowering ofwater level during the early Holocene resulted in the transformation of sedimentation process, and in the development of typologically differentiated mires and lacustrinc-mire complexes.
Źródło:
Studia Quaternaria; 2002; 37-53
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asynchronous development of two Late Glacial lake basins near the Drwęca ice-marginal valley (N Poland)
Autorzy:
Gamrat, W. W.
Błaszkiewicz, M.
Andrzejewski, L.
Krześlak, I.
Powiązania:
https://bibliotekanauki.pl/articles/2060377.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Palaeolakes
buried dead ice
Plenivistulian
Late Glacial
Holocene
northern Poland
Opis:
Lacustrine organic sediments were sampled at Gronowo (Chełmno Plateau) and Piotrkowo (Dobrzyń Plateau) located within a widespread system of subglacial channels separated by the large Drwęca ice-marginal valley. They have been examined for their pollen, plant macro-remains and geochemistry, as well as radiocarbon-dated. The analyses have allowed reconstructing the evolution of the area and presenting an asynchronous appearance of two lakes. Before lake sedimentation, glaciolimnic sediments from the end of Plenivistulian, at the site of Piotrkowo, was dated. Lacustrine sedimentation started during the Allerød at Gronowo, and during the Preboreal at Piotrkowo. The different age of the two lakes is ascribed mainly to differences in the Late Glacial drainage conditions which directly affected the melting away of dead-ice blocks buried in the channels.
Źródło:
Geological Quarterly; 2017, 61, 2; 450--464
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chronostratigraphy and changes of environment of Late Pleistocene and Holocene at Starunia palaeontological site and vicinity (Carpathian region, Ukraine)
Autorzy:
Sokołowski, T.
Stachowicz-Rybka, R.
Powiązania:
https://bibliotekanauki.pl/articles/191571.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Late Pleistocene
Holocene
fluvial deposits
environment
Starunia
Carpathian region
Ukraine
Opis:
This paper presents the results of absolute dating and biostratigraphical analysis carried out for alluvial sediments of an abandoned Starunia ozokerite mine located in the Velyky Lukavets River valley, in which large mammal remains were discovered in the first half of the 20th century. The sediments build up three terrace levels. The highest one, up to 8 m high (terrace II), is likely to be associated with a stage of aggradation, as well as with a short episode of valley broadening, which occurred in the Weichselian Late Pleniglacial. The lower one, 4 m high (terrace I), is most likely to be linked with the Holocene, despite a considerable transformation of its top due to mining activity. The lower part of this terrace cover bears coarse-grained channel sediments dated to 120.6-58.9 ka BP (Eemian Interglacial?-Early Pleniglacial - OIS 5e, 4 and 3), and overbank (distal floodplain) mud with intercalations of biogenic deposits (peat, peat mud and biogenic mud). The overbank deposits are dated to 48.2-11.11 ka BP (Glinde Interstadial?-Younger Dryas, OIS 3-2) and are overlain by Holocene (OIS 1) mud and biogenic deposits. In boreholes drilled in the vicinity of the present-day river channel, younger sediments occur more frequently. These include sediments originating from the Late Weichselian overlain by Holocene sediments. However, sediments originating exclusively from the Holocene are infrequent. The deposition of sediments took place in specific conditions of a permanent saturation of the environment with brine, petroleum and thickened bitumen. In the longest period of deposition (48.2-1.27 ka BP), ephemeral swamps, ponds and lakes were developed in different parts of the floodplain. They were marked by the presence of: Juncus glaucus/effusus, J. articulatus, Typha sp., Batrachium sp., Potamogeton filliformis, Bidens tripartita, Ranunculus sceleratus and Phragmites communis, as well as by halophytic species, like: Zannichellia palustris, Triglochin maritimum, Schoenoplectus tabernemontani, Puccinelia distans and Eleocharis palustris. Rhythmic oscillations between cold and warm climatic conditions, typical of the Weichselian age and well identified in Western Europe, are here marked by the changes of plant communities (woody assemblages passing into steppe and tundra), but are not noticeably recorded in the sediments of the Velyky Lukavets River. This shows that the greatest part of the discussed period involved the formation of poorly differentiated silty overbank sediments with intercalations of biogenic sediments. However, the variability of sediments provides evidence for extreme events which occurred in the Holocene.
Źródło:
Annales Societatis Geologorum Poloniae; 2009, 79, No 3; 315-331
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-proxy inferred hydroclimatic conditions at Bęczkowice fen (central Poland); the influence of fluvial processes and human activity in the stone age
Autorzy:
Płóciennik, Mateusz
Jakiel, Aleksandra
Forysiak, Jacek
Kittel, Piotr
Płaza, Dominik K.
Okupny, Daniel
Pawłowski, Dominik
Obremska, Milena
Brooks, Stephen J.
Kotrys, Bartosz
Luoto, Tomi P.
Powiązania:
https://bibliotekanauki.pl/articles/2037005.pdf
Data publikacji:
2021-12-23
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
peatland
palaeoecology
climate changes
Late Weichselian
Early Holocene
central Poland
Opis:
Fens have been forming in the river valleys of central Poland since the Bølling and went through a transformation from fully aquatic to semiterrestrial habitats during the Younger Dryas/Holocene transition. This drove plant and invertebrate communities and left a distinct pattern in chemical sediment composition, which is why river valley peatlands are sensitive palaeo-archives of climatic, hydrological and edaphic changes. Here we reconstruct the Late Weichselian history of the Bęczkowice fen in the upper Luciąża River valley using geochemical, pollen, Cladocera and Chironomidae proxies. Pollen-based age estimation indicates that the analysed peat sequence dates from the Bølling to Early Holocene. The layers 190-170 cm and 125-105 cm of the studied core were reworked by fluvial processes. Chironomidae and Cladocera communities indicate mostly limnetic conditions during the Allerød and early Younger Dryas. Peatland pools were supplied mostly by Luciąża River floods, but also by groundwater. Since the onset of the Holocene, the water level has dropped, eliminating aquatic midges and water fleas, and supporting taxa typical of astatic waters and wet soil.
Źródło:
Acta Geographica Lodziensia; 2021, 111; 135-157
0065-1249
Pojawia się w:
Acta Geographica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environment and man around Lakes Duba and Pelesa, SE Lithuania, during the Late Glacial and Holocene
Autorzy:
Stančikaite, M.
Kabailiene, M.
Ostrauskas, T.
Guobyte, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059887.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Lithuania
SE Lithuania
Holocene
Late Glacial
environmental changes
human impact
Opis:
Interdisciplinary investigations (pollen and diatom analysis, 14C dating and geological-geomorphological and archaeological data) around Lakes Duba and Pelesa, in SE Lithuania, have elucidated the environmental history and human impact throughout the Late Glacial and Holocene. Aerial photograph interpretations indicate that both lakes are residual basins of one Post-Glacial palaeolake outside the morainic relief of the Nemunas (Weichselian) Glaciation. Pollen assemblages from lacustrine deposits date back to the Older Dryas (Lake Duba) and Alleröd (Lake Pelesa) and cover all chronozones of the Post-Glacial. Diatom analysis has illustrated the palaeoecological conditions in the lakes and helped reconstruct successive water levels throughout the last 12300 radiocarbon years. Diatom abundance and the distribution of the planktonic, benthic and epiphytic species suggest a lowering of Lake Duba and Lake Pelesa at (e.g.) 11900-10900 14C BP, (e.g.) 10000-8100 14C BP and (e.g.) 3700-2500 14C BP. Pollen data suggest that the earliest signs of human impact and local forest clearances data from about (e.g.) 8400-8300 14C BP. The first record of cereal pollen in sediments dates from earlier than (e.g.) 6000 14C BP. Therefore, agriculture was introduced into the area not earlier than the second half of the Midle Neolithic, at about (e.g.) 5000-4400 14C BP. Continous indications of agriculture and progressive clearing of woodland is consistent with the increasing role of a farming economy during the Bronze Age. Since the 1800-1900 14C BP formation of an open canopy, increasing soil erosion and changes in vegetation emphasize the remarkable human impact on the environment.
Źródło:
Geological Quarterly; 2002, 46, 4; 391-410
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geological development of the Nemunas River Delta and adjacent areas, West Lithuania
Autorzy:
Bitinas, A.
Damusyte, A.
Stančikaite, M.
Aleksa, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059891.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Lithuania
Lithuanian Maritime region
Nemunas Delta
Late Glacial
Holocene
geochronology
palaeogeography
Opis:
Geological mapping at a scale of 1:50 000 of the Lithuanian Maritime region has recently been focused on the delta of the Nemunas River and its surroundings. Pollen, diatom and mollusc analyses, lithological investigations, and radiocarbon and optically stimulated luminescence dates have enabled stratigraphic correlation of the Late Glacial and Holocene deposits which make up this delta. Palaeogeographical reconstructions of the southern part of the Lithuanian Maritime region during the maximum extent of the Baltic Ice Lake (~12 000-11 200 years BP), the Ancylus Lake (~8 700-8 500 years BP), the Litorina Sea (~6 100 years BP) and the Post-Litorina Sea (~4 000 years BP) have been made. A geological and geomorphological model of the Nemunas River Delta and its adjacent areas has been constructed. Our results suggest that that part of Nemunas River Delta in Lithuania is very young, having formed during the last 1 000-1 100 years.
Źródło:
Geological Quarterly; 2002, 46, 4; 375-390
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 42

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