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Wyświetlanie 1-10 z 39
Tytuł:
Palaeoecological analysis of Berriasian ostracods of the central Crimea
Autorzy:
Savelieva, J.
Powiązania:
https://bibliotekanauki.pl/articles/2061054.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ostracods
Berriasian
palaeoecology
central Crimea
małżoraczki
paleoekologia
Krym centralny
Opis:
The author has completed a palaeoecological analysis of assemblages of ostracods, collected from the sections of the Berriasian deposits of central Crimea. The strata belonging to this stage are divided into four formations, and these into stratigraphic subdivisions of member rank, numbered 1–29. The members accumulated in deeper and shallower environments in a shallow marine basin, and are distinguished on the basis of the characteristic features of the composition of the ostracod complexes. Changes of temperature conditions and water mobility were identified.
Źródło:
Volumina Jurassica; 2014, 12, 1; 163--174
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molluscs and ostracods of the qarun lake:preliminary report from fa-1 core in faiyum oasis, Northern Egypt
Autorzy:
Szymanek, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2026006.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Molluscs
ostracods
Holocene
Qarun Lake
Egypt
Egipt
Opis:
A research was conducted on the Holocene lake sediments from the full-cored FA-1 drilling at the southern shore of the Qarun Lake in the Faiyum Oasis in northern Egypt. Altogether 10 taxa of molluscs and 8 taxa of ostracods were identified in the examined deposits, with total amounts of 768 and 2872 individuals, respectively. The fauna was investigated with palaeoecological purpose and allowed for preliminary reconstruction of sedimentary environment in the lake. The occurrence of Valvata nilotica Jickeli, 1874 and Gomphocythere sp. in the lower part of the core and a low proportion of carapaces (2.4–28%) indicated freshwater and higher-energy conditions, respectively. Rapid expansion of Cyprideis torosa (Jones, 1850) at a depth of 18 m could point to very short saline episode in the lake. The increase in salinity and drop of water level were evidenced in the uppermost part of the core (4–3.5 m), when the lake was dominated by Hydrobia ventrosa (Montagu, 1803), Cerastoderma glaucum (Poiret, 1789) and C. torosa. The steady sedimentation in a shallow lake was also supported by considerable amount of complete ostracod carapaces (45%). The faunal assemblage and smooth valves of C. torosa suggested salinity of 14–25‰.
Źródło:
Studia Quaternaria; 2017, 34; 39-45
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Hirnantian deep-water refuge for warm-water ostracods in Baltoscandia
Autorzy:
Truuver, K.
Meidla, T.
Powiązania:
https://bibliotekanauki.pl/articles/2059998.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Upper Ordovician
Baltic Palaeobasin
ostracods
north-eastern Poland
Kętrzyn IG1 borehole
Opis:
The latest Ordovician is marked by a severe climate change, the Hirnantian glaciation. This climatic event affected many marine taxa including ostracods. Rich and abundant ostracod assemblages of the Baltic Palaeobasin were severly impoverished. Many of the typical pre-Hirnatian warm-water ostracod species died out, but also some distinct, cold-water species appeared. Two very different but likely coeval latest Ordovician ostracod assemblages are recorded in the Baltic countries and north-eastern Poland. The latest Ordovician Estonian Shelf (inner ramp) is characterized by the Medianella aequa association whilst sections in the Livonian Basin (middle to outer ramp) reveal the Harpabollia harparum association that is thought to represent a cold-water assemblage belonging to the Dalmanitina-Hirnantia Fauna sensu lato. A transitional assemblage composed of a “species mixture” of typical Hirnantian cold-water and some pre-Hirnantian warm-water ostracod species is described for the first time from the Kętrzyn IG1 borehole, north-eastern Poland. The assemblage is dominated by Cryptophyllus pius sp. n. The genus Cryptophyllus is rare in the two other well-known assemblages. The discovery suggests that marginal parts of the Baltic Palaeobasin could serve as a kind of refuge for the last representatives of the ostracod faunas of the inner shelf of Baltic Palaeobasin. The Hirnantian assemblage is replaced by the low-diversity recovery assemblage that is dated as late Hirnantian-Silurian in Estonia and other areas. This suggests that the position of the systemic boundary in the Kętrzyn borehole and elsewhere in north-eastern Poland should be re-evaluated.
Źródło:
Geological Quarterly; 2015, 59, 4; 738--749
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeogeography of Late Glacial and Lower Holocene lakes in the Pomeranian Bay on the basis ofmalacofauna and ostracods and seismoacoustic data
Autorzy:
Krzymińska, Jarmila
Przedziecki, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2026791.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Pomeranian Bay
malacofauna
ostracods
seismoacoustic data
Opis:
Within a small (2.5 x 2.5 km) test field, located in the eastern part of the Pomeranian Bay, the geological structure was sq investigated in detail using seismoacoustic profiling and coring. In the cores, mineral grain size and micro- and macrofauna were analysed. Basing on seismoacoustic records, three main seismostratigraphic units were distinguished. The lowest unit is built of sand and muddy sand. Higher up lies the unit of sandy mud, in some places - of clay. Fauna assemblages indicate cold climate conditions, and clearly point to an existence of lacustrine reservoir of oligotrophic character. Analysis of cores shows that sedimentation began in bog conditions. The lakes in the area existed till the Atlantic period, when due to sea transgression they became filled with sandy sediments. The third unit is built mainly of fine sand, locally medium sand, even with addition of gravel. Basing on the presence of marine fauna, this unit is classified as marine sand.
Źródło:
Studia Quaternaria; 2001, 18; 3-10
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silurian myodocope ostracods from Poland
Autorzy:
Perrier, V.
Olempska, E.
Siveter, D.J.
Williams, M.
Legiot, N.
Powiązania:
https://bibliotekanauki.pl/articles/22910.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Newly collected material reveals that the Silurian myodocope ostracods from the Holy Cross Mountains, Poland comprise ten species (one new to science) belonging to four families: Bolbozoidae, Entomozoidae, Rhomboentomozoidae, and Cypridinidae. Biostratigraphic control using graptolites indicates that all three Polish outcrops investigated are of about the same chronostratigraphical level: middle Gorstian, lower Ludlow. The new occurrences in Poland extend the known distribution of several species and reinforce data that show many Silurian myodocope species with wide dispersal. Our new observations on the Holy Cross Mountains material confirm that the occurrences of Silurian myodocopes are mostly associated with pelagic animals and with rocks ranging from mudstone, siltstone or shale deposited in open- or deep-shelf marine settings. The cosmopolitan distribution of these ostracods, coupled with their facies and faunal associations, supports the notion of an ostracod (myodocope) ecological shift from benthic to planktonic habitats during the late Wenlock and Ludlow.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lower Eifelian ostracods from the West Swietokrzyskie Mountains
Małżoraczki z dolnego eiflu zachodniej części gór Świętokrzyskich
Autorzy:
Malec, J.
Powiązania:
https://bibliotekanauki.pl/articles/22755.pdf
Data publikacji:
1989
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Twenty-two benthic ostracod species have been described from the lower Eifelian Partitus Zone, the Chimaerothyris dombrowiensis local brachiopod biozone. The species described by Gürich (1896) and Kummerow (1953) from the lower Eifelian of Dąbrowa have been revised and the following new ones described: Sulcatiella pusilla, Evlanella kielcensis, Jefina larga, Cytherellina clara, Orthocypris magna, Bairdiacypris subbafasi and Cryptophyllus nidae. Neotypes of the following species have been designated: Rishona obliqua (Gürich), Poloniella devonica Gürich, Evlanella humiliformis (Gürich) and Bythocyproidea polaris (Gürich).
W pracy przedstawiono zespół dolnoeifelskich małżoraczków z wapieni lokalnej biozony ramienionogowej Chimaerothyris dombrowiensis z Dąbrowy i ze Zbrzy (fig. 1). W utworach tych wyróżniono 32 gatunki małżoraczków należących do 27 rodzajów (Tablica 1). Opisano 22 gatunki w tym 7 jako nowe (pl. 1—5): Sulcatiella pusilla sp. n., Evlanella kielcensis sp. n., Jefina larga sp. n., Cytherellina clara sp. n., Orthocypris magna sp. n., Bairdiacypris subbafasi sp. n. i Cryptophyllus nidae sp. n. Spośród okazów topotypowych wyznaczono neotypy gatunków: Rishona obliqua (Gürich), Poloniella devonica Gürich, Evlanella humiliformis (Gürich) i Bythocyproidea polaris (Gürich). Na podstawie konodontów występujących w wapieniach poziomu Chimaerothyris dombrowiensis profilu Grzegorzowic, w sposób pośredni określono wiek osadów z Dąbrowy i ze Zbrzy, zawierających zbadane małżoraczki, na dolny eifel. W przybliżeniu odpowiada on konodontowemu poziomowi partitus, będąc najprawdopodobniej wiekowym ekwiwalentem osadów formacji Lauch z Gór Eifel.
Źródło:
Acta Palaeontologica Polonica; 1989, 34, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated palaeontological characteristics (ammonites, ostracods, foraminifers, dinocysts) of the Berriasian deposits of central Crimea
Autorzy:
Savelieva, J.
Feodorova, A.
Shurekova, O.
Arkadiev, V.
Powiązania:
https://bibliotekanauki.pl/articles/2061034.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Berriasian
biostratigraphy
ostracods
foraminifers
spores
pollen
dinoflagellates
ammonites
palaeoecology
correlation
central Crimea
biostratygrafia
małżoraczki
otwornice
zarodniki
pyłek
wiciowce
amonity
paleoekologia
Krym centralny
Opis:
The Berriasian deposits of the central Crimea have been studied in order to compose a composite sequence of the stage with detailed palaeontological characterization. The Berriasian includes the Bedenekyrskaya Formation (packstones), Bechku Formation (siltstones, sandstones) and Kuchkinskaya Formation (sponge packstones, clays, siltstones, and coral-algal bioherm framestones). The Jacobi, Occitanica and Boissieri zones were identified based on ammonites found in the sections. A micropalaeontological analysis determined the following: 6 foraminiferal assemblages, the Costacythere khiamii – Hechticythere belbekensis and Costacythere drushchitzi – Reticythere marfenini ostracod assemblages, and a Phoberocysta neocomica dinocyst assemblage. Palaeoecological analysis of the ostracod and foraminiferal associations indicates a moderately warm marine basin with normal salinity and shallow depths (tens of meters). Only the sponge horizon was probably deposited in a deeper-water environment.
Źródło:
Volumina Jurassica; 2014, 12, 1; 129--162
1896-7876
1731-3708
Pojawia się w:
Volumina Jurassica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent ostracods from Admiralty Bay, King George Island, West Antarctica
Autorzy:
Majewski, Wojciech
Olempska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/2052043.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
King George Island
Ostracoda
Recent
Źródło:
Polish Polar Research; 2005, 26, 1; 13-36
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Middle Jurassic ostracods of the Częstochowa Region (Poland)
Małżoraczki środkowo-jurajskie regionu Częstochowskiego
Srednejurskie ostrakody Chenstokhovskogo rajjona (Polsha)
Autorzy:
Blaszyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/23018.pdf
Data publikacji:
1967
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Źródło:
Acta Palaeontologica Polonica; 1967, 12, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 39

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