Results 91 to 100 of about 1,022 (197)

Integrated conodont biostratigraphy and stable isotope chemostratigraphy from the Tremadocian (Lower Ordovician) of the Yangtze Platform, South China

open access: yes
Tremadocian (Lower Ordovician) carbonate rocks were collected from the Xiangshuidong section in the Hubei Province, South China, and analysed for conodont biostratigraphy.
Yan, Guanzhou   +5 more
core   +1 more source

The world`s oldest crustoid graptolites from the Upper Tremadocian of Poland [PDF]

open access: yes, 2005
The Crustoidea are an order of sessile basic graptolites that are morphologically intermediate between the extant genus Rhabdopleura (Rhabdopleuroidea) and the extinct sessile order—the Dendroidea (Kozłowski 1962, 1966; Bulman 1970; Urbanek 1986). So far
Mierzejewski, P   +2 more
core  

Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications [PDF]

open access: yes, 2016
The late Cambrian-Early Ordovician sequences of the Cordillera Oriental in northwestern Argentina are extensive and highly fossiliferous. The olenid trilobite Parabolinella argentinensis Kobayashi sensu Harrington and Leanza, 1957 was reported from a ...
Ramirez, Mariano Andres   +2 more
core   +1 more source

Platypeltoides carmenae: A new Nileidae (Trilobita) from the Lower Ordovician (Tremadocian) of Guelmim area; Western Anti-Atlas, Morocco

open access: yes, 2017
Se describe una nueva especie del género Platypeltoides, P. carmenae, de los esquistos de Fezouata, Ordovícico Inferior (Tremadociense) de la provincia de Guelmim (Marruecos).
López Soriano, Francisco J.   +3 more
core  

Cambrian–early Ordovician volcanism across the South Armorican and Occitan domains of the Variscan Belt in France: Continental break-up and rifting of the northern Gondwana margin [PDF]

open access: yes, 2016
The Cambrian–lower Ordovician volcanic units of the South Armorican and Occitan domains are analysed in a tectonostratigraphic survey of the French Variscan Belt.
Álvaro-Blasco, José Javier   +7 more
core   +1 more source

PRESENZA Dl TREMADOCIANO AD ACRITARCHI IN UNITA' TETTONICHE ERCINICHE A SUD DEL LAGO Dl MULARGIA (SARDEGNA CENTRALE)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2020
The activity of the first Hercynian tectonic phase is documented in the Lake Mulargia area (central Sardinia) by the presence of numerous tectonic units.
SEBASTIANO BARCA   +3 more
doaj  

Lower Tremadocian (Ordovician) lingulate brachiopods from the Central Andean Basin (NW Argentina) and their biogeographical links [PDF]

open access: yes, 2023
A Lower Tremadocian (Tr1) lingulate assemblage from the Guayoc Chico Group (Pupusa Formation) is described and illustrated for the first time. The fauna consists of poorly preserved obolids referred to Libecoviella? sp. and Torobolus cf.
Lavié, Fernando Julián   +1 more
core  

The COSC-2 drill core and its well-preserved lower Palaeozoic sedimentary succession – an unexpected treasure beneath the Caledonian nappes [PDF]

open access: yesEstonian Journal of Earth Sciences
The Collisional Orogeny in the Scandinavian Caledonides (COSC) project focuses on processes related to the closure of the Iapetus Ocean, causing the Ordovician–Silurian continent–continent collision between Baltica and Laurentia.
Oliver Lehnert   +18 more
doaj   +1 more source

GRAIN SIZE ANALYSIS AND MINERALOGY OF THE TREMADOCIAN DICTYONEMA SHALE IN ESTONIA [PDF]

open access: yesOil Shale, 2022
Aadu Loog   +3 more
doaj   +1 more source

PYRITE VARIETIES IN ESTONIAN TREMADOCIAN ARGILLITE (DICTYONEMA SHALE) [PDF]

open access: yesProceedings of the Estonian Academy of Sciences. Geology, 1992
Toivo Kallaste, Eduard Pukkonen
openaire   +1 more source

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