Results 101 to 110 of about 1,784 (228)

The only known cyclopygid–‘atheloptic’ trilobite fauna from North America: the upper Ordovician fauna of the Pyle Mountain Argillite and its palaeoenvironmental significance [PDF]

, 2012
The trilobite fauna of the upper Ordovician (middle Katian) Pyle Mountain Argillite comprises a mixture of abundant mesopelagic cyclopygids and other pelagic taxa and a benthic fauna dominated by trilobites lacking eyes.
Bruton, D.L., ALAN W. OWEN, DAVID L. BRUTON, Owen, A.W.   +3 more
core   +1 more source

Magnetic Susceptibility of North American Ordovician Epicontinental Seas: Spatial Variability and Sandbian-Katian Boundary Correlation [PDF]

, 2015
Magnetic susceptibility (χ) has gained increased usage as a stratigraphic correlation tool. This project evaluates the utility of a χ correlation tool, including its shortcomings, and attempts its integration with other datasets.
Schramm, Thomas J.
core   +2 more sources

The oldest larval crinoid: pentacrinoid stage crinoid from the Cannifton Quarry Lagerstätte (Ordovician, Katian) of Ontario, Canada

Journal of Paleontology
The geologically oldest known crinoid pentacrinoid larva is reported from Verulam Formation (Katian) from the Lafarge Cannifton Agg Quarry in Cannifton, Ontario, Canada.
W. Ausich, Steven W. Hetrick, S. Leslie
semanticscholar   +1 more source

Data from: An echinoderm Lagerstätte from the Upper Ordovician (Katian), Ontario: taxonomic re-evaluation and description of new dicyclic camerate crinoids [PDF]

, 2017
The Upper Ordovician (lower Katian) Bobcaygeon and Verulam formations from the Lake Simcoe region of Ontario contain a highly diverse echinoderm assemblage that is herein recognized as a Konservat-Lagerstätte.
Cole, Selina R., Wright, David F., William I. Ausich, Selina R. Cole, Ausich, William I., Koniecki, Joseph M., David F. Wright, Joseph M. Koniecki   +7 more
core   +1 more source

Katian conodonts from the Portrane Limestone: the first Ordovician conodont fauna described from Ireland [PDF]

, 2014
The Portrane Limestone, which crops out in a small inlier about 17 km north of Dublin, is one of the few significant carbonate units in the Ordovician of Ireland.
Sevastopulo, George D., FERRETTI, Annalisa, Bergström, Stig M.   +2 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

Rhombot and the dawn of paleobionics. [PDF]

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

Palaeoecological analysis of the Late Katian (Upper Ordovician) mud mounds from the Boda Limestone Formation, Dalarna, Sweden [PDF]

, 2015
Die Boda mud mounds der Boda Limestone Formation entstanden während des späten Katiums (spätes Ordovizium). Eine reichhaltige und gut erhaltene Fauna ist aus den Flankenbereichen und synsedimentären Taschen bekannt.
Gröbner, David Klaus
core  

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

Shared patterns in body size declines among crinoids during the Palaeozoic extinction events. [PDF]

Sci Rep, 2021
Salamon MA, Brachaniec T, Kołbuk D, Saha A, Gorzelak P.   +4 more
europepmc   +1 more source