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Resultados globales: 16 registros encontrados en 0.02 segundos.
Artículos, Encontrados 16 registros
Artículos Encontrados 16 registros  1 - 10siguiente  ir al registro:
1.
18 p, 6.4 MB Multiphase dolomitization in the Jutana Formation (Cambrian), Salt Range (Pakistan) : evidences from field observations, microscopic studies and isotopic analysis / Khan, S. (Quaid-i-Azam University (Pakistan). Department of Earth Sciences) ; Shah, M. M. (Quaid-i-Azam University (Pakistan). Department of Earth Sciences)
Excellent dolomite exposures are observed in the eastern Salt Range (Pakistan), where the Cambrian Jutana Formation consists of two distinct units (i. e. oolitic - pisolitic unit and massive dolomite unit). [...]
2019 - 10.1344/GeologicaActa2019.17.2
Geologica acta, Vol. 17 (2019) , p. 1-18 (Articles)  
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2.
17 p, 2.8 MB Review of the Ediacaran-Lower Ordovician (pre-Sardic) stratigraphic framework of the Eastern Pyrenees, southwestern Europe / Padel, Maxime (Bureau de Recherches Géologiques et Minières-BRGM (Orléans, França)) ; Clausen, Sébastien (Université de Lille) ; Álvaro, Jose Javier (Universidad Complutense de Madrid. Instituto de Geociencias) ; Casas Tuset, Josep Maria (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà)
The Ediacaran-Lower Ordovician successions exposed in the Eastern Pyrenees are updated and revised based on recent U-Pb zircon radiometric ages, intertonguing relationships of carbonate-dominated strata, and onlapping patterns marking the top of volcano-sedimentary complexes. [...]
2018 - 10.1344/GeologicaActa2018.16.4.1
Geologica acta, Vol. 16 Núm. 4 (December 2018) , p. 339-355 (Articles)  
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3.
13 p, 5.0 MB Trace fossils from the Desejosa Formation (Schist and Greywacke Complex, Douro Group, NE Portugal) : new Cambrian age constraints / Dias da Silva, Í (Instituto Geológico y Minero de España) ; Jensen, S. (Universidad de Extremadura) ; González Clavijo, E. (Instituto Geológico y Minero de España)
Trace fossils from a new locality in the Desejosa Formation, Freixo de Espada à Cinta area, northeast Portugal, are described, including Teichichnus rectus and the first Cambrian record from Iberia of the ichnogenus Rosselia, identified as R. [...]
2014 - 10.1344/105.000002080
Geologica acta, Vol. 12, Núm. 2 (June 2014) , p. 109-120  
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4.
10 p, 1.9 MB Chronostratigraphic Subdivision of the Cambrian of China / Peng, S. (Chinese Academy of Sciences. Nanjing Institute of Geology and Palaeontology)
The chronostratigraphic framework for the Cambrian of South China is reviewed. Currently four series and nine stages are recognized. The Cambrian of South China is subdivided into one pre-trilobite-bearing series, the Diandongian Series, and three trilobite-dominated series, the Qiandongian, Wulingian, and Hunanian. [...]
2003 - 10.1344/105.000001600
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 135-144  
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5.
8 p, 1.9 MB Trilobites and intercontinental tie points in the Upper Cambrian of Scandinavia / Ahlberg, P. (Lunds universitet. Division of Historical Geology and Palaeontology)
The Upper Cambrian faunas of Scandinavia are generally dominated by olenid trilobites, which provide a firm basis for the biostratigraphic classification. The olenids tend, however, to be provincial and facies controlled. [...]
2003 - 10.1344/105.000001599
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 127-134  
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6.
6 p, 806.7 KB A new occurence of the genus Tonkinella in northern Spain and the Middle Cambrian intercontinental correlation / Gozalo, R. (Universitat de València. Departament de Botànica i Geologia) ; Mayoral, E. (Universidad de Huelva. Departamento de Ciencias de la Tierra) ; Gámez Vintaned, José Antonio (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Dies, Mª E. (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Muñiz, F. (Universidad de Huelva. Departamento de Ciencias de la Tierra)
The genus Tonkinella is a typical polimeroid trilobite in lower Middle Cambrian rocks from Vietnam, Canada, U. S. A. , India, Korea, Siberia, China and Argentina. It has recently been found in the Mediterranean region (Iberian Chain, northeastern Spain). [...]
2003 - 10.1344/105.000001598
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 121-126  
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7.
10 p, 843.9 KB The Cambrian of the Iberian Peninsula : an overview / Gozalo, R. (Universitat de València. Departament de Botànica i Geologia) ; Liñán, E. (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Palacios, T. (Universidad de Extremadura) ; Gámez Vintaned, José Antonio (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Mayoral, E. (Universidad de Huelva. Departamento de Ciencias de la Tierra)
This work is a brief overview of the Cambrian in the Iberian Peninsula, along with an updated review of lithostratigraphic and biostratigraphic data. A Cambrian correlation chart between the different stratigraphical units that have been established in the Iberian Peninsula is given. [...]
2003 - 10.1344/105.000001596
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 103-112  
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8.
10 p, 6.9 MB Biogenic and physical sedimentary structures in latest Cambrian-earliest Ordovician mudrock facies (Famatina Range, Northwestern Argentina) / Esteban, S. B. (Universidad Nacional de Tucumán. Facultad de Ciencias Naturales)
Lamination is a common feature in shales and other mud-dominated rocks. When combined with other geological evidence, the diverse lamination types can provide important information about sedimentary processes and depositional environments. [...]
2003 - 10.1344/105.000001594
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 85-94  
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9.
12 p, 3.2 MB Cambrian sponge spicules and Chancelloriid sclerites from the Argentine Precordillera : a Review / Beresi, M. S. (Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina). Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales)
Spicules of sponges and sclerites of chancelloriids have been collected from in situ Cambrian sections of the La Laja Formation (San Juan Precordillera). They have also been collected from carbonate olistoliths, which were emplaced from the Cambrian units in the Early Ordovician Los Sombreros Formation (San Juan Precordillera) and Empozada Formation (Mendoza Precordillera). [...]
2003 - 10.1344/105.000001593
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 73-84  
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10.
12 p, 1.3 MB Biostratigraphic significance of the latest Cambrian-earliest Ordovician agnostoid trilobites from Northwestern Argentina / Tortello, M. F. (Museo de La Plata (La Plata, Argentina). Departamento Paleozoología Invertebrados)
The biostratigraphic significance of the latest Cambrian-earliest Ordovician trilobite agnostoids from northwestern Argentina is summarized. A characterization of the faunas recognized below and above the Cambrian-Ordovician boundary is presented on the bases of information from sierra de Cajas (Jujuy Province, Eastern Cordillera; Lampazar and Cardonal Formations), río Volcancito (La Rioja Province, Famatina range; Volcancito Formation) and other localities assigned to the Parabolina frequens argentina Biozone. [...]
2003 - 10.1344/105.000001592
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 61-72  
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Artículos : Encontrados 16 registros   1 - 10siguiente  ir al registro:
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