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Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

Tytuł:: Magnetostratigraphy of the Upper Berriasian “Zavodskaya Balka” section (East Crimea, Feodosiya
Autorzy:: Guzhikov, A.
Bagayeva, M.
Arkadiev, V.
Powiązania:: https://bibliotekanauki.pl/articles/2061052.pdf
Data publikacji:: 2014
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: magnetostratigraphy
Berriasian
Crimea
rock magnetism
magnetostratygrafia
Krym
Opis:: The results of magnetostratigraphic investigations in the Upper Berriasian Zavodskaya Balka section (Feodosiya, Crimea) are presented: magnetic polarity information, data on magnetic susceptibility, its anisotropy (АМS), frequency dependence (FD-factor) and other petromagnetic parameters. The analysis of the thermomagnetic and magnetic saturation curves has proved the presence of magnetite, being the main carrier of the remanent magnetization. Magnetic cleaning with alternating field and with temperature mostly has revealed the two-component composition of the magnetization, and the magnetostratigraphy is based on the directions of the most stable of them, with unblocking field from 35–50 mT and temperature from 300 to 540°C. The palaeomagnetic column presented specifies four heteropolar magnetozones – analogous to the M16 and M15 magnetic chrons (full M16n and M15r, parts of M16r and M15n). The existence of the M16n.1r subchron (“Feodosiya”) is substantiated, and it should be included into the Geomagnetic Polarity Time Scale. By bio- and magnetostratigraphic correlation, the section studied is an age analogue of the Paramimounum, Picteti and Alpillensis (probably Otopeta) subzones of the Boissieri Zone. The calculated sedimentation rate varied from 26.6 to 29.5 m/My.
Źródło:: Volumina Jurassica; 2014, 12, 1; 175--184
1896-7876
1731-3708
Pojawia się w:: Volumina Jurassica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

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

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