The latest Ordovician Hirnantian brachiopod faunas: New global insights [PDF]
Earth-Science Reviews, 2020 Abstract The temporal and spatial distribution of Hirnantian brachiopod faunas are reviewed based on a new, comprehensive dataset from over 20 palaeoplates and terranes, a revised correlation scheme for Hirnantian strata and numerical methods including network analysis. There were two successive evolutionary faunas: 1.
Jiayu Rong +2 more
exaly +7 more sources
Different controls on the Hg spikes linked the two pulses of the Late Ordovician mass extinction in South China [PDF]
Scientific Reports, 2022 The Late Ordovician mass extinction (LOME, ca. 445 Ma; Hirnantian stage) is the second most severe biological crisis of the entire Phanerozoic. The LOME has been subdivided into two pulses (intervals), at the beginning and the ending of the Hirnantian ...
Zhen Qiu +5 more
doaj +2 more sources
End-Ordovician ostracod faunal dynamics in the Baltic Palaeobasin [PDF]
Estonian Journal of Earth Sciences, 2021 The Late Ordovician Baltic Palaeobasin (BPB) offered a favourable environment for a diverse and abundant ostracod fauna to thrive across the basin.
Karin Truuver, Tõnu Meidla, Oive Tinn
doaj +3 more sources
Hirnantian Isotope Carbon Excursion in Gorny Altai, southwestern Siberia [PDF]
Estonian Journal of Earth Sciences, 2015 The Hirnantian Isotope Carbon Excursion (HICE), a glaciation-induced positive δ13C shift in the end-Ordovician successions, has been widely used in chemostratigraphic correlation of the Ordovician–Silurian boundary beds in many areas of the world ...
Nikolay V. Sennikov +2 more
doaj +2 more sources
Changes in palaeoclimate and palaeoenvironment in the Upper Yangtze area (South China) during the Ordovician–Silurian transition [PDF]
Scientific Reports, 2022 The Ordovician–Silurian transition was a critical period in geological history, during which profound changes in climatic, biotic, and oceanic conditions occurred.
Xin Men, Chuanlong Mou, Xiangying Ge
doaj +2 more sources
The first hirnantian (Uppermost Ordovician) Odontopleurid trilobite from western Gondwana (Argentina) [PDF]
REVISTA BRASILEIRA DE PALEONTOLOGIA, 2014 An odontopleurid trilobite remain is described for the fi rst time from Hirnantian (uppermost Ordovician) rocks of Western Gondwana. Very rare material, represented by a single left librigena, comes from a new fossil locality of the Don Braulio Formation
Halpern, Karen +2 more
core +4 more sources
Volcanism and basalt weathering drove Ordovician climatic cooling [PDF]
Nature CommunicationsCausal connections among major Ordovician environmental and biological events (i.e., long-term climatic cooling, Hirnantian Glaciation, Great Ordovician Biodiversification Event, and Late Ordovician Mass Extinction) remain in debate, and the hypothesis ...
He Zhao +5 more
doaj +2 more sources
The succession of Hirnantian events based on data from Baltica: brachiopods, chitinozoans, conodonts, and carbon isotopes [PDF]
Estonian 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
Changes in shelf phosphorus burial during the Hirnantian glaciation and its implications [PDF]
Estonian Journal of Earth Sciences, 2023 The Late Ordovician mass extinction occurred during an icehouse interval, accompanied by the glaciation of the supercontinent Gondwana, which was located at the South Pole at that time.
Johann Müller +4 more
doaj +2 more sources
New insights on the Hirnantian palynostratigraphy of the Rio Ceira section, Buçaco, Portugal [PDF]
, 2011 The Lower Palaeozoic successions of Portugal are well represented in the Central Iberian Zone (Cll), one of the main tectonostratigraphic domains of the Iberian Massif.
Fernandes, Paulo +5 more
core +3 more sources