Metal enrichment in lithologically complex black shales: a case study from the Tremadocian of NE Estonia [PDF]
Estonian Journal of Earth Sciences, 2021 Significantly elevated U, Mo, Zn and Pb contents characterize the Early Ordovician black shales in the Sillamäe area, NE Estonia. The presence of silty interlayers with sulphidic mineralization and authigenic carbonates suggests unique physicochemical ...
Rutt Hints +4 more
doaj +1 more source
The Atlas-Meseta Red Beds basin (Morocco) and the Lower Ordovician rifting of NW-Gondwana [PDF]
BSGF - Earth Sciences Bulletin, 2016 The transition from the Cambrian to Ordovician in Morocco is known to be characterized by a frequent Furongian hiatus, restricted extension of the Tremadocian marine deposits, and frequent unconformities at the base of the transgressive upper Floian ...
Ouanaimi Hassan +4 more
doaj +1 more source
The eoorthid brachiopod Apheoorthina in the Lower Ordovician of NW Argentina and the dispersal pathways along western Gondwana [PDF]
Acta Palaeontologica Polonica, 2016 The eoorthid brachiopod Apheoorthina is reported for the first time from the Lower Ordovician of NW Argentina. It is represented by a species similar to A.
Diego F. Muñoz , Juan L. Benedetto
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A new marrellomorph euarthropod from the Early Ordovician of Argentina [PDF]
Acta Palaeontologica Polonica, 2017 Marrellomorphs (class Marrellomorpha) are a group of Paleozoic arthropods with a very poor fossil record. Here we describe a new marrellomorph arthropod Mimetaster florestaensis sp. nov. from the Tremadocian (earliest Ordovician) of Argentina.
María J. Aris +3 more
doaj +1 more source
New Insights into the Early Diversification of the Ostracoda: Tremadocian Ostracods from the Cordillera Oriental, Argentina [PDF]
Acta Palaeontologica Polonica, 2012 New species of ostracods from the Tremadocian in the northwest region of Argentina are described. These are among the earliest well-documented records of ostracods, which shed new light onto the early diversification of the group. The described fauna consists of seven species, five of which are new: Saltite uchuy sp. nov., Saltite kuraq sp.
Salas, Maria Jose +1 more
openaire +2 more sources
Latin American Journal of Sedimentology and Basin Analysis, 2021 The Upper Cambrian-Tremadocian rocks exposed in the Alfarcito area of Cordillera Oriental, northwest Argentina reveal a series of transgressive-regressive cycles punctuated by incision of fluvio-estuarine valleys.
Luis A. Buatois +5 more
doaj +2 more sources
Cambrian Furongian–Middle Ordovician conodonts in the northeastern margin of the South China Block (Chuzhou, Anhui province) and their paleogeographic implications [PDF]
Journal of MicropalaeontologyThe South China Block is crucial for the global study of Cambrian to Ordovician conodont biostratigraphy, but research on its northeastern margin is relatively scarce.
B. Hu +5 more
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The diverse bivalved arthropods of Castle Bank (Darriwilian, Ordovician), Wales
Papers in Palaeontology, Volume 12, Issue 5, September/October 2026.Abstract The Darriwilian (Didymograptus murchisoni Biozone, Middle Ordovician) Castle Bank Lagerstätte, near Llandrindod, Wales (UK) hosts a diverse assemblage of marine animals, generally under 10 mm in size. Here we provide an overview of the diversity of bivalved arthropods from Castle Bank.
Stephen Pates +3 more
wiley +1 more source
, 2019 Adrain, Jonathan M., Karim, Talia S. (2019): Revision of the Early Ordovician (late Tremadocian; Stairsian) cheirurid trilobite Tesselacauda Ross, with species from the Great Basin, western USA. Zootaxa 4661 (2): 201-255, DOI: 10.11646/zootaxa.4661.2.
Adrain, Jonathan M., Karim, Talia S.
core +1 more source
First description of Skolithos burrows from the Cambrian–Ordovician boundary interval of the Central Anti-Atlas, Morocco [PDF]
Estonian Journal of Earth Sciences, 2017 Skolithos burrows indicate high-energy nearshore environment. In this paper, abundant Scolithos burrows from two particular levels of the Cambrian–Ordovician boundary interval of the Central Anti-Atlas, Morocco, are described for the first time.
Abdelfattah Azizi +4 more
doaj +1 more source