EARLY LLANDOVERY CHITINOZOANS FROM JORDAN [PDF]
Palaeontology, 2009 Abstract: Chitinozoans recovered from cores BG‐14 and WS‐6 in southern and eastern Jordan are described. Sample ages are well‐constrained by graptolite data to the ascensus‐acuminatus and vesiculosus graptolite biozones. Eighteen chitinozoan taxa are recognized, with Spinachitina fragilis, Plectochitina nodifera, Ancyrochitina laevaensis and ...
openaire +2 more sources
A Cenozoic-style scenario for the end-Ordovician glaciation [PDF]
, 2014 The end-Ordovician was an enigmatic interval in the Phanerozoic, known for massive glaciation potentially at elevated CO2 levels, biogeochemical cycle disruptions recorded as large isotope anomalies and a devastating extinction event.
Achab, A +10 more
core +8 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
A new chitinozoan species from the Middle Ordovician of Estonia [PDF]
Estonian Journal of Earth Sciences, 2012 A new species Baltochitina delicata is formally defined. This rare species has been identified in the Aseri Regional Stage (Darriwilian) in North Estonian sections. The genus Baltochitina was known so far only by a single species B. nolvaki, which occurs
Jaak Nõlvak
doaj +1 more source
Devonian palynological assemblages from the San Antonio x-1 Borehole, Tarija Basin, northwestern Argentina [PDF]
, 2011 The palynological analysis of the 2548-3628 m interval of the San Antonio x-1 Borehole in northwestern Argentina is presented. The illustrated palynoflora is composed of 96 species represented by diverse palynological groups such as trilete spores and ...
Di Pasquo, M. M., Noetinger, S.
core +4 more sources
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
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
doaj +1 more source
The palaeobiogeographical spread of the acritarch Veryhachium in the Early and Middle Ordovician and its impact on biostratigraphical applications [PDF]
, 2014 The genus Veryhachium Deunff, 1954, is one of the most frequently documented acritarch genera, being recorded from the Early Ordovician to the Neogene.
Li, Jun +5 more
core +2 more sources