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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Late Ordovician scolecodonts and chitinozoans from the Pin Valley in Spiti, Himachal Pradesh, northern India [PDF]
Acta Palaeontologica PolonicaThe end of the Ordovician witnessed major perturbations in the ecosystem, seriously affecting global marine biodiversity. Nevertheless, some marine organism groups and their crisis-bound palaeogeographic distribution are still understudied.
PETRA TONAROVÁ +8 more
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Chitinozoan diversity in the East Baltic Silurian [PDF]
Estonian Journal of Earth Sciences, 2009 Data on the diversity of the East Baltic Silurian chitinozoans have been compared to global chitinozoan biozones that are approximately correlated with the graptolite scale. The total diversity and balanced total diversity curves have three main positive
Nestor, Viiu
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Swiss Journal of PalaeontologySilurian strata are well-developed in the northwest margin of Yangtze Platform. A total of 117 densely spaced argillaceous samples were taken from the Shenxuanyi Member, upper Ningqiang Formation to the lowermost Chejiaba Formation of the Majia section ...
Yangui Li +10 more
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Chitinozoans: recommendations on russian-language terminology of morphological characters
Geologicheskii vestnikThe article is devoted to the problem of describing chitinozoans in Russian language. Comparison of domestic paleontological descriptions of different years showed the absence of a single Russian-language terminology for the morphological elements of ...
R. R. Yakupov
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LOWER TO MIDDLE ORDOVICIAN ACRITARCHS AND CHITINOZOANS FROM NORTHERN KARAKORUM MOUNTAINS, PAKISTAN
Rivista Italiana di Paleontologia e Stratigrafia, 2000 The lower Vidiakot section (Chitral, Pakistan) comprises the lower part (Yarkhun Formation and the base of the Vidiakot Formation) of the terrigenous complex transgressively overlying the crystalline basement of Northern Karakorum.
MARCO QUINTAVALLE +2 more
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Boundary between the Porkuni and Juuru regional stages in the Neitla section, Estonia [PDF]
Estonian Journal of Earth Sciences, 2023 Conodonts and chitinozoans were studied from the Neitla section, which exposes the boundary between the Porkuni and Juuru regional stages. This level, although not proved biostratigraphically, has been traditionally considered to correspond to the ...
Peep Männik, Jaak Nõlvak
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The detailed Middle to early Late Ordovician faunal succession and δ13Ccarbon chemistry of the Kårehamn drill core, offshore eastern Öland, Sweden: implications for stratigraphy and correlation [PDF]
Estonian Journal of Earth Sciences, 2023 The Middle to lower Upper Ordovician stratigraphy of the KÃ¥rehamn core, drilled ca 7 km offshore to the east of the KÃ¥rehamn village, northeastern Ãland, is presented. The investigated core is one of four drill cores obtained during the preparation of
Svend Stouge +4 more
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Silurian chitinozoans from Varna section
Vestnik of Institute of Geology of Komi Science Center of Ural Branch RAS, 2016 R. R. Yakupov
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The role of clay minerals in the preservation of Precambrian organic‐walled microfossils
Geobiology, Volume 21, Issue 6, Page 708-724, November 2023., 2023 Abstract Precambrian organic‐walled microfossils (OWMs) are primarily preserved in mudstones and shales that are low in total organic carbon (TOC). Recent work suggests that high TOC may hinder OWM preservation, perhaps because it interferes with chemical interactions involving certain clay minerals that inhibit the decay of microorganisms.
C. R. Woltz +3 more
wiley +1 more source