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Wyświetlanie 1-10 z 76
Tytuł:
Late Holocene glacier advances in Revdalen, Spitsbergen
Autorzy:
Karczewski, Andrzej
Kostrzewski, Andrzej
Marks, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/2058158.pdf
Data publikacji:
1981
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
stratigraphy of Holocene
Źródło:
Polish Polar Research; 1981, 2, 1-2; 51-61
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
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:
Molluscan assemblages in Late Holocene tufa cones in the Pieniny Mountains (southern Poland)
Autorzy:
Alexandrowicz, W. P.
Powiązania:
https://bibliotekanauki.pl/articles/2059741.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
calcareous tufa
molluscan assemblages
historic period
Pieniny Mts.
South Poland
Opis:
Limestone rock walls of various inclination form a favourable substrate for the deposition of calcareous tufas that form cone-shaped structures located at the foot of slopes or fill niches within them. Such carbonate deposits usually contain rich and diversified molluscan assemblages, whose composition and structure closely correspond to the ambient environmental conditions in the immediate vicinity. The study of the Pieniny Mountains area revealed 10 sites with such deposits. The identified malacofouna was subjected to detailed analysis. It enabled identification of three types of faunistic assemblages (Bythinella austriaca assemblage, Pyramidula pusilla assemblage, and a shade-loving species assemblage), which are related to the conditions prevailing during the deposition. Tufa cones found in the Pieniny Mountains represent the historic period (Late Holocene). The deposits provide a record of two climatic phases: warmer and colder. The former (Medieval Warm Period) involved the intensified deposition of carbonate material and the rapid growth of tufa cones. The latter – the Little Ice Age – entailed the slow degradation of cones and slower sedimentation of tufas, while the intensified physical weathering led to the increase in the clast material proportion (sharp-edged limestone fragments). Tufas accumulated in the zone unaffected by high anthropogenic pressure and thus represent a record of natural environmental changes during the historic period
Źródło:
Geological Quarterly; 2014, 58, 2; 269--280
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Holocene palaeoenvironment of Tse Dura, a Later Stone Age (LSA) rock shelter, north-central Nigeria
Autorzy:
Orijemie Emuobosa Akpo, Orijemie
Powiązania:
https://bibliotekanauki.pl/articles/2025245.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Microliths
Vegetation history
Plant management
Tiv
Middle Benue Valley
Nigeria
Nauki o Ziemi
Opis:
Palynological and archaeobotanical analyses were conducted on excavated sediments from Tse Dura, a Later Stone Age rock shelter in north-central Nigeria with the aim of reconstructing the environment conditions at the site within the last millennium. From 933 ± 29 BP to 802 ± 29 BP, the environment alternated between Guinea savanna with dry conditions, and secondary and riverine forests with humid conditions. During these periods of environmental fluctuations, the LSA populations engaged in the management of economic plants the most significant of which included Dioscorea spp. Pennisetum glaucum and Elaeis guineensis, and exploited wild plants such as Pavetta crassipes, Sarcocephalus latifolius and Lophira cf. lanceolata for dietary and ethnomedicinal purposes. Around 310 ± 30 BP cal, the environment became very wet after which it was succeeded by a drier period. It was during this period that Sorghum bicolor became prominent, and the environment attained its current status dominated by Guinea savanna elements and secondary forests.
Źródło:
Studia Quaternaria; 2018, 35; 41-53
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Late Holocene changes in vegetation of the Mrągowo Lakeland (NE Poland) as registered in the pollen record from Lake Salęt
Autorzy:
Szal, Marta
Kupryjanowicz, Mirosława
Wyczółkowski, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/2027099.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
veg e ta tion trans for ma tions
Late Ho lo cene
pol len anal y sis
Mr¹gowo Lake Dis trict
Masuria
NE Po land
Opis:
Pol len anal y sis of sed i ments from the up per part of bot tom de pos its from Lake Salêt al lowed re con struc tion of main stages of the Late Ho lo cene veg e ta tion trans for ma tion in the Mr¹gowo Lake Dis trict (from ca. 3600 cal. years BC) and to cor re late some of these changes with im mi gra tion and eco nomic ac tiv ity of lo cal hu man groups. Sig nif i cant spread - ing of sec ond ary semi-nat u ral birch for est, de vel op ment of horn beam for est and in creas ing im por tance of anthropogenic open com mu ni ties were the most char ac ter is tic fea tures of veg e ta tion evo lu tion. A def i nite break down of elm took place be tween 2900 and 2500 cal. years BC, slightly af ter in creased con tri bu tion of birch in wood lands. Dis appear ance of ha zel around 1200 cal. years BC, ac com pa nied by ex pan sion of horn beam has been ob served and should be linked with ac tiv ity of the Z¹bie-Szestno type cul ture and the Lusatian cul ture tribes dur ing the Bronze Age, but not with a cli mate change. Con sid er able in ten si fi ca tion of set tle ment pro cesses re corded in the youn ger part of the Subatlantic chronozone was one of the im por tant rea sons that were re spon si ble for quick changes in for est struc ture. Strong and con tin ued de for es ta tion started as early as the end of the 10th cen tury AD and was sub stan tially in ten si fied in the first half of the 13th cen tury.
Źródło:
Studia Quaternaria; 2014, 31; 51-60
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Późnoholoceńskie osady wypełniające paleomeander Bobru na północ od Wysokiej
The Late-Holocene sediments filling the Bobr river paleomeander north of Wysoka
Autorzy:
Florek, W.
Powiązania:
https://bibliotekanauki.pl/articles/2095960.pdf
Data publikacji:
1980
Wydawca:
Poznańskie Towarzystwo Przyjaciół Nauk
Źródło:
Badania Fizjograficzne nad Polską Zachodnią. Seria A:Geografia Fizyczna; 1980, 33; 19-28
0067-2807
Pojawia się w:
Badania Fizjograficzne nad Polską Zachodnią. Seria A:Geografia Fizyczna
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:
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:
Górnoholoceńskie i współczesne formy i osady pozakorytowe w dolinie środkowej Wieprzy
Late Holocene and recent landforms and floodplain deposits in the middle Wieprza valley
Autorzy:
Kaczmarzyk, J.
Florek, W.
Olszak, I. J.
Powiązania:
https://bibliotekanauki.pl/articles/294502.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
Paleomeandry
holocen
osady pozakorytowe
równina zalewowa
wczesne średniowiecze
grodzisko
Wieprza
Paleomeanders
Holocene
overbank deposits
floodplain
Early Middle Ages
stronghold
Wieprza River
Opis:
Celem autorów było rozpoznanie osadów pozakorytowych w dolinie środkowej Wieprzy i możliwie dokładne określenie ich wieku oraz miejsc i warunków ich akumulacji na równinie zalewowej. Zastosowano przy tym zestaw metod geomorfologicznych i geologicznych odnoszących się do analizy form występujących na równinie zalewowej i i budujących je osadów.Wcelu określenia ich wieku wykorzystano datowania radiowęglowe, datowania archeologiczne i w odniesieniu do osadów mineralnych – metodę termoluminescencyjną. Analizom poddano osady basenu powodziowego, osady wypełniające różnowiekowe paleomeandry oraz subfosylne i współczesne osady pozakorytowe.
The aim of the study has been to recognize overbank deposits in the middle Wieprza valley, including their precise dating and assessment of local conditions of sedimentation. It is based on geomorphological and geological research of floodplain landforms and deposits. Ages have been determined using radiocarbon method, archaeological dating and, for minerogenic deposits, TL dating. Analyses have been performed on floodplain basin deposits, palaeomeander infills, and subfossil and recent overbank deposits. The studied palaeomeanders have variable infills from various periods of the Sub-Atlantic. They are accompanied by diversified point bar deposits. Floodplain basin deposits have a similar, Sub-Atlantic age. Both types of deposits are overlain by flood deposits, which have accumulated since the early Middle Ages. Contemporary flood deposits of the Wieprza river differ from the sub-fossil ones through more restricted occurrence, resultant from channelization and channel incision. Therefore, in comparison to the pre-channelization period, the extent of floods is smaller and does not encompass the entire Holocene floodplain. Flood overbank deposits form only in the immediate vicinity of the channel.
Źródło:
Landform Analysis; 2008, 7; 80-94
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 76

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