Results 1 to 10 of about 1,994 (194)

Early and early Middle Ordovician chitinozoans from the Baldone drill core, central Latvia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2022
Early and early Middle Ordovician chitinozoans are relatively poorly known in Baltoscandia, thus the understanding of the early diversification of the group, as well as its biostratigraphic utility, is limited. In this paper, we document the distribution
Jaak Nõlvak, Yan Liang, Olle Hints
doaj   +2 more sources

On future directions of Ordovician chitinozoan research [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Chitinozoans have been known to science for nearly a century. Due to their biostratigraphic utility, chitinozoans were intensively studied from the 1960s to the 1980s, and they have an important place in Ordovician stratigraphy nowadays, alongside ...
Yan Liang   +3 more
doaj   +2 more sources

Chitinozoan nomenclature and databases [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
In 1930, Alfred Eisenack suggested the term ‘chitinozoan’ for a microfossil group that he discovered from erratic boulders on the Baltic Sea coast.
Sonia Camina   +2 more
doaj   +2 more sources

Morphological variation suggests that chitinozoans may be fossils of individual microorganisms rather than metazoan eggs. [PDF]

open access: yesProc Biol Sci, 2019
Chitinozoans are organic-walled microfossils widely recorded in Ordovician to Devonian (ca 485–359 Mya) marine sediments and extensively used in high-resolution biostratigraphy.
Liang Y   +6 more
europepmc   +2 more sources

Lower Silurian biostratigraphy of the Viirelaid core, western Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2007
The distribution of five groups of fossils in the upper Llandovery (Telychian) and Wenlock of the Viirelaid core section, Estonia, is presented and discussed in terms of their biozones (conodonts and chitinozoans) and mutual positions (scolecodonts ...
Nestor, Viiu   +6 more
doaj   +4 more sources

Latest Sandbian brachiopods and chitinozoan biostratigraphy in North Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The latest Sandbian brachiopods and chitinozoans were studied in the Kõrgessaare and Haapsalu drill cores of Estonia. The brachiopod fauna shows a gradual renewal through the Keila Regional Stage (RS), differently from the rather persistent association ...
Linda Hints, Jaak Nõlvak
doaj   +2 more sources

Chitinozoan biostratigraphy of the Přídolí Series of the East Baltic [PDF]

open access: yesEstonian Journal of Earth Sciences, 2011
The succession of chitinozoans in the East Baltic Přídolí Series was studied in the Ohesaare, Ventspils D-3, Pavilosta and Dubovskoye (Northern-Gusevskaya 2) drill cores.
Viiu Nestor
doaj   +3 more sources

The succession of Hirnantian events based on data from Baltica: brachiopods, chitinozoans, conodonts, and carbon isotopes [PDF]

open access: yesEstonian Journal of Earth Sciences, 2008
The Hirnantian (late Ordovician) environment was complex and dynamic. Understanding the correct order of events and their precise correlation with a time scale are extremely important for the development of different kinds of environmental ...
Kaljo, Dimitri   +3 more
doaj   +3 more sources

Early–Middle Ordovician chitinozoans from the Dawan Formation, Yichang area, Central China [PDF]

open access: yesJournal of Micropalaeontology
The late Early to early Middle Ordovician is a key interval for chitinozoan macroevolution, during which chitinozoans diversified significantly, reaching their first enormous radiation later in the Darriwilian.
Y. Liang   +5 more
doaj   +2 more sources

A new chitinozoan assemblage from the Middle Devonian Los Monos Formation (sub-Andean basin, southern Bolivia) and its biozonal implications for Western Gondwana. [PDF]

open access: yesPLoS ONE
Chitinozoans recovered from one section of the Middle Devonian Los Monos Formation in the TCB X-1001-Tacobo borehole, sub-Andean basin of Bolivia, have been analysed.
Sonia C Camina   +5 more
doaj   +2 more sources

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