Results 31 to 40 of about 180 (132)
Ordovician graptolites from the basal part of the Palaeozoic transgressive sequence in the Karadere area, Zonguldak Terrane, NW Turkey [PDF]
Estonian Journal of Earth Sciences, 2014 The Karadere area to the east of Safranbolu in NW Anatolia is one of the very few localities in Turkey where the contact between the Cadomian basement and the Lower Palaeozoic transgressive succession is well exposed.
M. Cemal Göncüoglu +3 more
doaj +1 more source
Lithosphere, 2022 Amalgamation of the Yangtze and Cathaysia blocks in the context of Gondwana assembly in the early Paleozoic has been addressed for decades, but the far-field effects on the Yangtze Block during the amalgamation remain unclear.
Hao Tang +8 more
doaj +1 more source
Trilobite expansion into estuarine environments during the Ordovician radiation [PDF]
Estonian Journal of Earth Sciences, 2023 Trilobites have traditionally been considered fully marine. Through the integration of ichnological, palaeobiological and sedimentological datasets within a sequence-stratigraphic and stratiÂgraphic palaeobiology framework, we challenge this assumption.
M. Gabriela Mángano +5 more
doaj +1 more source
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
Linguliform brachiopods from the Cambrian (Guzhangian) Karpinsk Formation of Novaya Zemlya
Papers in Palaeontology, Volume 6, Issue 4, Page 571-592, November 2020., 2020 Abstract A moderately diverse assemblage of micromorphic linguliform brachiopods, including Tapuritreta gribovensis sp. nov., Wahwahlingula? pankovensis sp. nov., Acrothele sp., Anabolotreta? sp., Orbithele? sp. and Stilpnotreta sp., is for the first time described from the Cambrian Karpinsk Formation (Miaolingian, Guzhangian) of the South Island of ...
Lars E. Holmer +6 more
wiley +1 more source
The Depositional Record, Volume 6, Issue 3, Page 581-604, September 2020., 2020 Middle to Upper Ordovician ironstone and associated sedimentary rocks of the West Asturian‐Leonese and Cantabrian tectonostratigraphic zones, Spain, provide new information regarding the Palaeozoic Fe cycle and the palaeoceanography of the Rheic Ocean.
Peir K. Pufahl +6 more
wiley +1 more source
Geologica 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 +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
doaj +1 more source
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