Contrasting Early Ordovician assembly patterns highlight the complex initial stages of the Ordovician Radiation [PDF]
Scientific Reports, 2022 The Early Ordovician is a key interval for our understanding of the evolution of life on Earth as it lays at the transition between the Cambrian Explosion and the Ordovician Radiation and because the fossil record of the late Cambrian is scarce.
Farid Saleh +12 more
doaj +3 more sources
Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism
Geophysical Monograph Series, Page 247-262., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Lawrence M. E. Percival +3 more
wiley +10 more sources
An Ordovician ostracod palaeopsychrosphere? [PDF]
Estonian Journal of Earth Sciences, 2023 Ostracods are tiny bivalved crustaceans with a fossil record extending into rocks of the Lower Ordovician. They occupy almost all aquatic environments today, from the ocean abyssal planes to damp forest leaf litter.
Anna McGairy +6 more
doaj +2 more sources
The Irish Ordovician brachiopod fauna: A taxonomic renaissance [PDF]
Estonian Journal of Earth Sciences, 2023 Despite its small areal extent, the island of Ireland exposes eight Caledonian tectonic terranes; six of them contain Ordovician brachiopod assemblages. These terranes record the early phases and destruction of the Iapetus Ocean through the occurrence of
David A. T. Harper
doaj +1 more source
Ordovician enigmatic sclerite-type elements from western Argentina: possible oldest axial components of alcyonacean octocorals [PDF]
Acta Palaeontologica Polonica, 2021 The unusual findings of Lower and Middle Ordovician tiny sclerite-type elements in the San Juan Formation of the Argentine Precordillera are described and analysed.
Marcelo G. Carrera +3 more
doaj +1 more source
Changes in the morphology of Late Ordovician ostracods along the shelf-to-basin transect of the Baltic Palaeobasin [PDF]
Estonian Journal of Earth Sciences, 2022 The present work analyses the numerical distribution data of ostracods in the Late Ordovician (Katian) deposits of Estonia for establishing trends in carapace morphology along a facies profile from a shallow shelf to a deep basin.
Stefi Guitor, Tõnu Meidla
doaj +1 more source
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
doaj +1 more source
The earliest Ordovician trace fossils Cruziana and Rusophycus from Baltica [PDF]
Estonian Journal of Earth Sciences, 2023 Trace fossils of the ichnogenera Cruziana and Rusophycus are described for the first time from the Lower Ordovician of Baltica. These specimens were found from the upper Tremadocianâlower Floian glauconite sandstone of the Leetse Formation in the ...
Helje Pärnaste +2 more
doaj +1 more source
Recent advances in the Ordovician stratigraphy of the Baltic Palaeobasin and Tornquist margin of Baltica [PDF]
Estonian Journal of Earth Sciences, 2023 Ordovician rocks are widely distributed in the Baltoscandian region as well as in Poland, Belarus, Ukraine and Moldova. The Ordovician studies in this area were initiated in the 19th century in the outcrop belt in northern Estonia.
Tõnu Meidla +3 more
doaj +1 more source
Palaeozoic carbon isotope excursions and carbonate component analysis [PDF]
Estonian Journal of Earth Sciences, 2023 Palaeozoic carbonate δ13C studies have mainly focused on bulk rock analysis in chemostratigraphic correlations and palaeoenvironmental interpretations, assuming limited isotopic heterogeneity of samples.
Imre Andreas Martin +2 more
doaj +1 more source