Results 91 to 100 of about 1,129 (198)

Evaluation of the Preservation of Chitinozoans in a Case Study of the Katian?—Hirnantian Succession, Eastern Precordillera of Argentina

Fossil Studies
The poor preservation state of chitinozoans recovered from samples of the La Pola (Sandbian–Katian) and Don Braulio formations (Hirnantian-Llandovery), after being processed with standard methods, required significant modifications in processing. The sodium hexametaphosphate technique was used to avoid invasive mechanical procedures.
Jessica Gómez, Mercedes di Pasquo, Leonardo Silvestri   +2 more
openaire   +1 more source

A collection of pelmatozoans (Echinodermata) from the Lady Burn Starfish Beds (Upper Ordovician, Katian), SW Scotland

, 2015
A new collection of crinoids and rhombiferans from the Upper Ordovician (Katian) Lady Burn Starfish Beds of SW Scotland is small, yet contains several significant specimens.
Donovan, Stephen K., Clark, Neil D.S.
core   +1 more source

Stratigraphy and trilobite biofacies of the Late Ordovician (Katian) of the Taimyr Peninsula, Arctic Russia

, 2018
The thick Late Ordovician (Katian) succession on the Taimyr Peninsula, Arctic Russia is divided into three regions showing a transition from a southern carbonate dominated facies, a central transitional facies, and a siliciclastic dominated northern ...
Fortey, Richard A.,, Ebbestad, Jan Ove R.,   +1 more
core  

Carbonate mud mounds, conglomerates, and sea-level history in the Katian (Upper Ordovician) of central Sweden

, 2010
The Katian (Upper Ordovician) facies succession of the Siljan district, central Sweden, records some of the most prominent environmental changes in the Ordovician of Baltoscandia. These changes include two separate phases of major sea-level drawdown that
Lehnert, Oliver, Joachimski, Michael, Calner, Mikael,   +2 more
core   +1 more source

Resenha: Mobile Methods

, 2012
Mobile Methods Monica Büscher, John Urry, Katian Witchger Routledge Londres, 2011, 206 ...
Nogueira, Maria Alice
core   +1 more source

Upper Katian (Upper Ordovician) trans-Atlantic δ13C chemostratigraphy : the geochronological equivalence of the ELKHORN and PAROVEJA excursions and its implications

, 2020
Since 2010 when the North American ELKHORN and Baltoscandic PAROVEJA isotope excursions were first described and named, their mutual age relations have remained uncertain, if not controversial.
Kleffner, Mark, Eriksson, Mats E., Bergström, Stig M., Stig M. Bergström, Mark Kleffner, Mats E. Eriksson, Bergström, Stig M.,, Kleffner, Mark,, Eriksson, Mats E.,   +8 more
core   +1 more source

Rapid marine oxygen variability: Driver of the Late Ordovician mass extinction. [PDF]

Sci Adv, 2022
Kozik NP, Young SA, Newby SM, Liu M, Chen D, Hammarlund EU, Bond DPG, Them TR, Owens JD.   +8 more
europepmc   +1 more source

Filling the Gondwanan gap:paleobiogeographic implications of new crinoids from the Castillejo and Fombuena formations (Middle and Upper Ordovician, Iberian Chains, Spain)

, 2017
A diverse crinoid fauna is described from the Upper Ordovician (Katian) Fombuena Formation from the eastern Iberian Chains of Spain. New crinoids include the diplobathrid camerates Fombuenacrinus nodulus n. gen. n. Sp., Goyacrinus gutierrezi n. gen.
Cole, Selina R., Colmenar Lallena, Jorge, Colmenar, Jorge, William I. Ausich, Selina R. Cole, Ausich, William I., Zamora Iranzo, Samuel Andrés, Samuel Zamora, Zamora, Samuel, Jorge Colmenar   +9 more
core   +1 more source

Rhombot and the dawn of paleobionics. [PDF]

Proc Natl Acad Sci U S A, 2023
Ausich WI.
europepmc   +1 more source

Geochemical Changes in the Late Ordovician to Early Silurian Interval in the Northern Margin of the Upper Yangtze Platform, Southern China: Implications for Hydrothermal Influences and Paleocean Redox Circumstances. [PDF]

ACS Omega, 2023
Fu X, Liu X, Xiong S, Li X, Wu Q, Xiao B.   +5 more
europepmc   +1 more source