Chronostratigrahy of Acritarchs and Chitinozoans from upper Ordovician Strata from the Robat-e Gharabil Area, NE Alborz Mountains, Northern Khorassan Province: Stratigraphic and Paleogeographic Implications [PDF]
Journal of Sciences, Islamic Republic of Iran, 2018 The Palaeozoic rock units mainly, Ghelli, Niur, Padeha, Khoshyeilagh and Mobark formations are well-exposed in the north of Robat-e Gharabil village. 116 out of 157 surface samples were analyzed to determine aged relationships of Ghelli Formation.
M. Ghavidel-Syooki, S. Borji
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Possible metazoan egg fossils from the Darriwilian (Middle Ordovician) of Baltoscandia [PDF]
Estonian Journal of Earth Sciences, 2021 The Baltoscandian lower Palaeozoic succession is well known for the abundance, diversity and excellent preservation of various groups of microfossils, such as acritarchs, chitinozoans, scolecodonts and conodonts.
Olle Hints, Jaak Nõlvak, Yan Liang
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Ordovician geology and stratigraphy of China: A synthesis [PDF]
Estonian Journal of Earth Sciences, 2023 China presently comprises several tectonic blocks and regions assembled over geological time and having independent histories. During the Ordovician, these blocks included South China, North China, Tarim, Qaidam, Junggar, Qiangtang-Qamdo, Lhasa and ...
Yuandong Zhang +9 more
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Chitinozoan Contribution to the Ordovician and Lower Silurian Paleobiogeography [PDF]
The Journal of Geology, 1992 Relationships between various Lower Silurian chitinozoan assemblages are established using statistical methods such as calculation of the number of species in common and similarity coefficient. Conclusions clearly indicate that Eastern Canadian chitinozoan fauna are distinct from those of the north Gondwana margin.
Achab, Aïcha +2 more
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A summary of the Brazilian Paraná Basin Ordovician [PDF]
Estonian Journal of Earth Sciences, 2023 The study of the Ordovician of Paraná Basin culminated on the three-fold lithostratigraphic subdivision of the Rio Ivaà Group as follows: Alto Garças, Iapó and Vila Maria formations.
Carolina Zabini +11 more
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The Llandovery–Wenlock boundary interval in west-central continental Estonia: an example from the Suigu (S-3) core section [PDF]
Estonian Journal of Earth Sciences, 2014 A gap corresponding to several conodont and chitinozoan zones occurs in the Llandovery–Wenlock boundary interval in some sections in the western coastal region of Estonia and on islands in the Muhu Strait.
Peep Männik +5 more
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A bio- and chemostratigraphic search for the Mid-Ludfordian Carbon Isotope Excursion interval in the Ludlow of the Ohesaare core, Estonia [PDF]
Estonian Journal of Earth Sciences, 2022 For years, the Ohesaare core section and its rich fossil assemblages have enticed researchers to suggest various ideas about Silurian stratigraphy in the East Baltic despite several sedimentary gaps occurring through the Ludlow interval in particular ...
Dimitri Kaljo +4 more
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Chitinozoan dynamics and biostratigraphy in the Väo Formation (Darriwilian) of the Uuga Cliff, Pakri Peninsula, NW Estonia [PDF]
Estonian Journal of Earth Sciences, 2010 The distribution of chitinozoans in the Väo Formation (Lasnamägi and Uhaku regional stages, Darriwilian) of the Uuga Cliff, Pakri Peninsula, NW Estonia, was investigated from 62 samples.
Tammekänd, Mairy +2 more
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A multiproxy study of the Puhmu core section (Estonia, Upper Ordovician): consequences for stratigraphy and environmental interpretation [PDF]
Estonian Journal of Earth Sciences, 2017 A multiproxy study of the Katian and Hirnantian in the Puhmu core in NE Estonia resulted in new data on chitinozoan and brachiopod biostratigraphy. Some mass occurrences of dasycladacean algae are tied to small early Katian ‘reefs’.
Dimitri Kaljo +3 more
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Journal of Spectroscopy, Volume 24, Issue 3-4, Page 207-212, 2010., 2010 Laser Raman microspectroscopy was used as a microchemical analysis technique to characterize the wall chemistry of organic‐walled microfossils (acritarchs and prasinophytes) extracted from Proterozoic (Tonian: ca. 900 Myr) and early Palaeozoic (Silurian: ca.
Marie-Claire Dhamelincourt +5 more
wiley +1 more source