Steep oceanic DIC δ13C depth gradient during the Hirnantian Glaciation

S Yang, J Fan, TJ Algeo, GA Shields, Y Zhou, C Li… - Earth-Science …, 2024 - Elsevier
The Hirnantian carbon isotopic excursion (HICE) was characterized by a positive δ 13 C
excursion (up to~+ 7‰) of oceanic dissolved inorganic carbon (DIC). However its …

Syndepositional and diagenetic processes in the pigmentation of Middle Ordovician carbonate red beds in South China

M Liu, C Fang, D Chen - Sedimentary Geology, 2024 - Elsevier
Marine red beds (MRBs) are often attributed to specific redox environments during
syndepositional and early diagenetic phases. During the Middle Ordovician, a succession of …

The Ordovician of Scandinavia: a revised regional stage classification

AT Nielsen, P Ahlberg, JOR Ebbestad… - Geological Society …, 2023 - lyellcollection.org
Abstract The Ordovician of Scandinavia (ie Denmark, Norway and Sweden) has been
investigated for over two centuries and, through time, various chronostratigraphic schemes …

[HTML][HTML] Calcium isotope constraints on a Middle Ordovician carbon isotope excursion

YD Adiatma, MR Saltzman, EM Griffith - Earth and Planetary Science Letters, 2024 - Elsevier
Abstract The Middle Ordovician Darriwilian Stage (∼ 469–458 Ma) records a∼ 2‰ positive
carbon isotope shift known as the MDICE (Mid-Darriwilian Carbon Isotope Excursion) …

Climate changes in the pre-Hirnantian Late Ordovician based on δ18Ophos studies from Estonia

P Männik, O Lehnert, J Nolvak… - Palaeogeography …, 2021 - Elsevier
Results of conodont-based δ 18 O phos studies from two core sections in Estonia
(Mehikoorma-421 and Valga-10) indicate that the pre-Hirnantian Late Ordovician was …

Marine oxygenation, deoxygenation, and life during the Early Paleozoic: an overview

J Zhang, CT Edwards, CW Diamond, TW Lyons… - Palaeogeography …, 2021 - Elsevier
Abstract The Early Paleozoic (Cambrian-Devonian) witnessed a series of significant
environmental changes including ocean-atmosphere oxygenation and progressive cooling …

Progressive expansion of seafloor anoxia in the Middle to Late Ordovician Yangtze Sea: implications for concurrent decline of invertebrate diversity

J Zhang, C Li, X Fang, W Li, Y Deng, C Tu… - Earth and Planetary …, 2022 - Elsevier
Abstract The Great Ordovician Biodiversification Event (GOBE) achieved its peak during the
Middle Ordovician, likely in association with climatic cooling and a rise of atmospheric O 2 …

Middle Ordovician paleoenvironmental evolution of the western Laurentian carbonate platform: Evidence for persistent oxygenation of the shallow ocean and …

CW Diamond, MR Saltzman, TW Lyons… - Palaeogeography …, 2024 - Elsevier
Abstract The Great Ordovician Biodiversification Event (GOBE) encompasses a series of
rapid and sustained diversification pulses unparalleled in Earth history. Despite the …

Seawater signatures of Ordovician climate and environment

SA Young, CT Edwards, L Ainsaar… - Geological Society …, 2023 - lyellcollection.org
Tracking climatic changes throughout the Ordovician is crucial to a better understanding of
the coevolution of life and environment on Earth. Ordovician climate fluctuations have been …

Lithium isotope stratigraphy and Ordovician weathering

YD Adiatma, MR Saltzman, XM Liu, XK Wang… - Earth and Planetary …, 2024 - Elsevier
Understanding the role of silicate weathering in controlling the long-term carbon cycle is
essential in exploring multi-million-year scale climate variabilities and links to tectonics and …