Results 111 to 120 of about 1,613 (196)

Depositional environments and stratigraphy of the Upper Cambrian-lower Ordovician Santa Rosita formation at the Alfarcito area, Cordillera Oriental, Argentina: integration of biostratigraphic data within a sequence stratigraphic framework

Latin American Journal of Sedimentology and Basin Analysis
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, Fernando J. Zeballo, Guillermo L. Albanesi, Gladys Ortega, N. Emilio Vaccari, M. Gabriela Mangano   +5 more
doaj  

Proposed Early Cambrian cephalopods are chimaeras, the oldest known cephalopods are 30 m.y. younger. [PDF]

Commun Biol, 2023
Landing E, Kröger B, Westrop SR, Geyer G.   +3 more
europepmc   +1 more source

THE NATURE OF POTASSIUM IN TREMADOCIAN DICTYONEMA SHALE (ESTONIA)

Oil Shale, 1996
Aadu Loog, J. Aruväli, Valter Petersell
openaire   +1 more source

Early Ordovician Magmatism in the northern Central Iberian Zone (Iberian Massif): New U-Pb (SHRIMP) ages and isotopic Sr-Nd data [PDF]

, 2011
Depto. de Mineralogía y PetrologíaFac.
Castiñeiras García, Pedro, Navidad Fernández de la Cruz, Marina   +1 more
core   +1 more source

New fossil assemblages from the Early Ordovician Fezouata Biota. [PDF]

Sci Rep, 2022
Saleh F, Vaucher R, Vidal M, Hariri KE, Laibl L, Daley AC, Gutiérrez-Marco JC, Candela Y, Harper DAT, Ortega-Hernández J, Ma X, Rida A, Vizcaïno D, Lefebvre B.   +13 more
europepmc   +1 more source

Biostratigraphie par Acritarches du Cambro-Ordovicien de Belgique et des regions limitotrophes: synthese et perspectives d'avenir [PDF]

, 1992
The stratigraphic significance of Cambrian and Ordovician acritarchs in Belgium and adjacent areas is discussed. It now appears that the age of the Deville group in the Ardenne (more precisely the upper part of this group) should be broadened to include ...
Vanguestaine, M.
core  

Furongian (Jiangshanian) occurrences of radiodonts in Poland and South China and the fossil record of the Hurdiidae. [PDF]

PeerJ, 2021
Zhu X, Lerosey-Aubril R, Ortega-Hernández J.   +2 more
europepmc   +1 more source

Caracterização geoquímica e isotópica de depósitos sedimentares vulcanogénicos do Ordovícico Inferior do Sinclinal de Moncorvo, Nordeste de Portugal [PDF]

, 2015
Os ambientes geodinâmicos extensionais na Zona Centro Ibérica, durante o Ordovícico Inferior, favoreceram a ocorrência de episódios vulcânicos. No sinclinal de Moncorvo há evidências desses episódios, preservados sob a forma de depósitos sedimentares ...
Azevedo, M. R., Corfu, F., Gomes, M. E. P., Meireles, C. A., Santos, J .F., Sá, A. A., Teixeira, R. J. S., Urbano, E. E. M. C.   +7 more
core  

AUTHIGENIC CARBONATE MINERALS IN THE TREMADOCIAN GRAPTOLITIC ARGILLITE OF ESTONIA

Oil Shale, 1995
Aadu Loog, J. Aruväli, Valter Petersell
openaire   +1 more source

Depositional environments and stratigraphy of the Upper Cambrian-lower Ordovician Santa Rosita formation at the Alfarcito area, Cordillera Oriental, Argentina: integration of biostratigraphic data within a sequence stratigraphic framework

Latin American Journal of Sedimentology and Basin Analysis, 2006
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, Fernando J. Zeballo, Guillermo L. Albanesi, Gladys Ortega, N. Emilio Vaccari, M. Gabriela Mangano   +5 more
doaj