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The Depositional Record, Volume 8, Issue 2, Page 502-523, June 2022., 2022 In a study of the Middle–Late Cambrian Port au Port Group, Newfoundland, marine cements precipitated on the lead up to and around the Steptoean Positive Carbon Isotope Excursion (SPICE) have been shown to contain increasing levels of strontium (up to 5500 ppm).
Joyce E. Neilson +4 more
wiley +1 more source
A nutrient control on expanded anoxia and global cooling during the Late Ordovician mass extinction
Communications Earth & Environment, 2022 Phosphorus recycling played a critical role in driving the Late Ordovician mass extinction through ocean euxinia, and in the initiation of the Hirnantian glaciation, according to geochemical analyses of marine rocks from China and global biogeochemical ...
Zhen Qiu +8 more
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A new species of graptolite from the western margin of the Kufra Basin, Libya [PDF]
, 2013 Normalograptus kufraensis sp. nov. occurs as monospecific assemblages in the Tanezzuft Formation at the western margin of the Kufra Basin (Jabal Eghei), southern Libya.
Elgardy, Mohamed +11 more
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Late Ordovician jawed polychaete fauna from the Spiti Valley, northern India [PDF]
Estonian Journal of Earth Sciences, 2023 The final part of the Ordovician Period was characterised by major perturbations in climate, environments and ecosystems, as proved by numerous studies. These changes resulted in one of the biggest extinctions in Earthâs history. Most research in early
Petra Tonarová +3 more
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More about the Ordovician–Silurian transition beds at Mirny Creek, Omulev Mountains, NE Russia: carbon isotopes and conodonts [PDF]
Estonian Journal of Earth Sciences, 2012 Profound environmental and biodiversity changes take place in the Ordovician–Silurian boundary interval. The Mirny Creek and Neznakomka River bank sections discussed in this paper expose the upper Katian–lower Rhuddanian part of the boundary beds.
Dimitri Kaljo +3 more
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Ordovician Bryozoa of Estonia [PDF]
Estonian Journal of Earth Sciences, 2023 sessile colonial, filter-feeding animals, many of which possess hard carbonate skeletons of different morphology. The bryozoan faunas of the Ordovician of Estonia were studied early by famous naturalists such as Karl Eduard von Eichwald and WÅadisÅaw ...
Andrej Ernst
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, 2023 <p><span>A total of 107 brachiopod genera of Hirnantian age among 42 localities worldwide are compiled into a binary dataset (Table S1; presence =1, absence = 0).
Jin, Jisuo, Harper, David A. T.
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EVENT STRATIGRAPHY AND CORRELATION PROBLEMS OF THE ORDOVICIAN STRATA OF GORNY ALTAI AND SALAIR
Геодинамика и тектонофизика, 2021 Study of the Ordovician sedimentary sequences of Gorny Altai and Salair has revealed lithological and paleontological features correlating with global sedimentary events:(1) The Acerocare Regressive Event (an initial event in the Early Tremadocian);(2 ...
N. V. Sennikov +5 more
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Hirnantian (latest Ordovician) bio- and chemostratigraphy of the Stirnas-18 core, western Latvia [PDF]
Estonian Journal of Earth Sciences, 2010 Integrated study of the uppermost Ordovician Porkuni Stage in the Stirnas-18 core, western Latvia, has revealed one of the most complete Hirnantian successions in the eastern Baltic region.
Hints, Linda +6 more
doaj
Middle–Late Ordovician organic- walled phytoplankton from Sweden: diversity and early radiation [PDF]
Estonian Journal of Earth Sciences, 2023 The Borenshult-1 core, drilled in the vicinity of Motala, east of Lake Vättern in south central Sweden, comprises a well-dated and nearly complete succession of marine marly carbonates deposited relatively close to land. The 34 core samples analyzed for
Claudia V. Rubinstein, Vivi Vajda
doaj +1 more source