Results 21 to 30 of about 1,022 (197)

Rhabdopleurid epibionts from the Ordovician Fezouata Shale biota and the longevity of cross-phylum interactions [PDF]

open access: yesCommunications Biology, 2023
Evidence of interspecific interactions in the fossil record is rare but offers valuable insights into ancient ecologies. Exceptional fossiliferous sites can preserve complex ecological interactions involving non-biomineralized organisms, but most of ...
Karma Nanglu   +3 more
doaj   +2 more sources

Tremadocian Graptolite-Conodont Biostratigraphy of the South American Gondwana margin (Eastern Cordillera, NW Argentina) [PDF]

open access: yesGeologica Acta, 2005
The Tremadocian graptolite and conodont faunas of the Gondwana Margin recorded at the Eastern Cordillera (EC) of Salta and Jujuy provinces (northwestern Argentina) are studied.
G. DEL CARMEN ORTEGA, G.L. ALBANESI
doaj   +4 more sources

Linguloidean brachiopods from the Lower Ordovician (Tremadocian) of northwestern Argentina [PDF]

open access: yesBulletin of Geosciences, 2015
The new obolid Torobolus subplanus gen. et sp. nov., from the lower Temadocian Devendeus Formation, the new species Libecoviella tilcarensis and Leptembolon argentinum, and Ectenoglossa sp.
Muñoz, Diego Fernando   +1 more
core   +5 more sources

Highly resolved taphonomic variations within the Early Ordovician Fezouata Biota [PDF]

open access: yesScientific Reports
The Fezouata Biota (Morocco) is a Burgess Shale-type (BST) assemblage that provides a wealth of information on Early Ordovician ecosystems. Much work has been done to compare the preservation of the Fezouata Biota to other BSTs.
Farid Saleh   +12 more
doaj   +2 more sources

Tremadocian Stylophoran Echinoderms From The Taebaeksan Basin, Korea.

open access: yesJournal of Paleontology, 2006
15 pagesInternational audienceAbundant isolated elements of cornute and mitrate stylophorans were recovered from the upper Tremadocian Tumugol Formation in the Taebaeksan Basin, Korea.
Lee, Seung-Bae   +2 more
core   +4 more sources

Revision of the March Formation (Tremadocian) in Southeastern Ontario

open access: yesCanadian Journal of Earth Sciences, 1973
Reference sections are proposed for the revised March Formation (Tremadocian) along the MacDonald–Cartier Freeway a few miles west of Brockville, Ontario.
Robert G. Greggs, Ivor J. Bond
core   +2 more sources

Tremadocian (Lower Ordovician) sea-level changes and biotas on the Avalon microcontinent

open access: yesJournal of Paleontology, 2011
The Chesley Drive Group, an Upper Cambrian-Lower Ordovician mudstone-dominated unit, is part of the Ediacaran–Ordovician cover sequence on the North American part of the Avalon microcontinent.
Richard A. Fortey, ED Landing
core   +2 more sources

Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera [PDF]

open access: yes, 2003
The aim of this contribution is to make known a graptolite assemblage from the Upper Tremadocian coming from the Mojotoro Range on the southeast part of the Argentine Eastern Cordillera (Figure 1a,b).
Monteros, Julio A., Moya, Maria Cristina
core   +3 more sources

Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Tremadocian highly metalliferous black shales and associated grey shales from the Aseri PH012B drill core (NE Estonia) in the innermost part of the Baltic Palaeobasin were targeted to record their nitrogen and organic carbon isotope variance combined ...
Mawo Ndiaye   +4 more
doaj   +1 more source

Early Tremadocian cephalopods from Santa Rosita Formation in NW Argentina: the oldest record for South America [PDF]

open access: yesActa Palaeontologica Polonica, 2023
We describe early Tremadocian (Kainella meridionalis Biozone) cephalopods from the Cordillera Oriental, Jujuy, NW Argentina. They consist of numerous small specimens collected at the Quebrada de Arenal, Trancas section, near the town of Tilcara, in the
MARCELA CICHOWOLSKI   +5 more
doaj   +1 more source

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