Results 111 to 120 of about 1,722,612 (173)

Late Middle to Late Ordovician Phosphate Accumulation of the Moyero River Section (Siberia): A Record of Upwelling and Global Cooling

Russian Journal of Earth Sciences
The phosphate-bearing rocks (phosphate rocks and phosphorites) were studied over a 45-meter interval of the Moyero river section, covering the upper part of the Darriwilian and the lower part of the Sandbian stages of the Ordovician.
Lykov Nikita Andreevich, Rostovtseva Yu., Dronov Andrey   +2 more
doaj   +1 more source

Recognition of fossil keratose sponges in carbonates using petrographic and machine‐learning classification

Sedimentology, Volume 73, Issue 6, Page 2246-2280, October 2026.
ABSTRACT Filamentous, anastomosing spar‐filled networks in Phanerozoic carbonates have been interpreted as the mineralised remains of keratose (non‐spiculate) sponges, yet their recognition remains contested because fabrics of broadly similar appearance may arise from microbial, diagenetic or physical processes. This study combines direct fossil–modern
Jeong‐Hyun Lee, Seung‐Sep Kim, Cui Luo   +2 more
wiley   +1 more source

Cornulitids (tubeworms) from the Late Ordovician Hirnantia fauna of Morocco

, 2018
Two species of cornulitids, Cornulites gondwanensis sp. nov. and C. aff. shallochensis Reed are described from the Hirnantian of Morocco, within an assemblage representative of the Hirnantia brachiopod fauna occurring near the Ordovician South Pole.
Gutiérrez Marco, Juan Carlos, Gutiérrez-Marco, J. C., Juan Carlos Gutiérrez-Marco, Vinn, Olev, Olev Vinn   +4 more
core   +1 more source

Cascading trend of Early Paleozoic marine radiations paused by Late Ordovician extinctions. [PDF]

Proc Natl Acad Sci U S A, 2019
Rasmussen CMØ, Kröger B, Nielsen ML, Colmenar J.   +3 more
europepmc   +1 more source

A common arthropod from the Late Ordovician Big Hill Lagerstätte (Michigan) reveals an unexpected ecological diversity within Chasmataspidida. [PDF]

BMC Evol Biol, 2019
Lamsdell JC, Gunderson GO, Meyer RC.
europepmc   +1 more source

Mercury Spikes Indicate a Volcanic Trigger for the Late Ordovician Mass Extinction Event: An Example from a Deep Shelf of the Peri-Baltic Region. [PDF]

Sci Rep, 2019
Smolarek-Lach J, Marynowski L, Trela W, Wignall PB.   +3 more
europepmc   +1 more source

Tempo of the Late Ordovician mass extinction controlled by the rate of climate change. [PDF]

Sci Adv
Zhang Z, Yang C, Sahy D, Zhan RB, Wu RC, Li Y, Deng Y, Huang B, Condon DJ, Rong J, Li XH.   +10 more
europepmc   +1 more source

Identifying the most surprising victims of mass extinction events: an example using Late Ordovician brachiopods. [PDF]

Biol Lett, 2017
Finnegan S, Rasmussen CMØ, Harper DAT.
europepmc   +1 more source

Late Ordovician eurypterid preserves oldest euchelicerate musculature in pyrite. [PDF]

Biol Lett
Bicknell RDC, Gaines RR, Hopkins MJ.
europepmc   +1 more source

Late Ordovician to Silurian evolution of Eastern Avalonia during Iapetus closure.

This chapter contains sections titled: Palaeocontinental Setting: Eastern Avalonia Converges with Baltica and Laurentia Changes in Global Sea Level and Climate Large-Scale Stratigraphic Signatures Post-Volcanic Transgressions and Mud Blankets (Late ...
Woodcock, N. H.
core   +1 more source