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Geologica acta

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Geologica acta 16 records found  Search took 0.01 seconds. 
1.
2 p, 439.6 KB Advances in Cambrian studies : a meeting in the Andes, VI field meeting of the Subcomission on Cambrian Stratigraphy, Argentina 2000 (IUGS-UNESCO) / Aceñolaza, G. F. (Universidad Nacional de Tucumán. Instituto Superior de Correlación Geológica) ; Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina) ; Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e I.M.L
2003 - 10.1344/105.000001587
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 3-4  
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2.
5 p, 1.3 MB The Subcommission on Cambrian Stratigraphy : the status quo / Shergold, J.H. (La Freunie, Benayes) ; Geyer, G. (Bayerische Julius-Maximilians-Universität. Institut für Paläontologie)
2003 - 10.1344/105.000001588
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 5-9  
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3.
11 p, 776.9 KB Review of the Cambrian Stratigraphy of the Argentine Precordillera / Bordonaro, O. (Universidad Nacional de San Juan (Argentina))
The Cambrian rocks of the Argentine Precordillera are analyzed and updated providing a new stratigraphic interpretation. The lithostratigraphic assemblages provide evidence that the Precordilleran Cambrian Basin was a rimmed platform. [...]
2003 - 10.1344/105.000001589
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 11-21  
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4.
17 p, 2.2 MB The Cambrian System in Northwestern Argentina : stratigraphical and palaeontological framework / Aceñolaza, G. F. (Universidad Nacional de Tucumán (Argentina). Instituto Superior de Correlación Geológica) ; Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina) ; Universidad Nacional de Tucumán. Instituto Superior de Correlación Geológica ; Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e I.M.L
Cambrian sequences are widespread in the early Paleozoic of the Central Andean Basin. Siliciclastic sediments dominate these sequences although several minor occurrences of carbonates and volcanic rocks have been observed. [...]
2003 - 10.1344/105.000001590
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 23-39  
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5.
20 p, 9.3 MB The Cambrian-Ordovician siliciclastic platform of the Balcarce Formation (Tandilia System, Argentina) : Facies, trace fossils, palaeoenvironments and sequence stratigraphy / Poiré, D. G. (Universidad Nacional de La Plata (La Plata, Argentina). Centro de Investigaciones Geológicas) ; Spalletti, L. A. (Universidad Nacional de La Plata (La Plata, Argentina). Centro de Investigaciones Geológicas) ; Valle, A. del (Universidad Nacional de La Plata (La Plata, Argentina). Centro de Investigaciones Geológicas) ; Spalletti, L.A.
The Lower Palaeozoic sedimentary cover of the Tandilia (Balcarce Formation) is made up of thick quartz arenite beds together with kaolinitic claystones and thin fine-grained conglomerates. The Balcarce Formation was formed in the nearshore and inner shelf environments of a tide-dominated and storm influenced open platform. [...]
2003 - 10.1344/105.000001591
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 41-60  
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6.
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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7.
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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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.
8 p, 5.2 MB El Alisal : a new locality with trace fossils of the Puncoviscana Formation (late Precambrian-early Cambrian) in Salta Province. Argentina / Aceñolaza, G. F. (Universidad Nacional de Tucumán (Argentina). Instituto Superior de Correlación Geológica) ; Tortello, M. F. (Museo de La Plata) ; Tortello, M.F. (Museo de La Plata) ; Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina) ; Universidad de Tucumán. Facultad de Ciencias Naturales e IML
The Puncoviscana, Suncho and Las Aguaditas/Negro Peinado formations represent a thick siliciclastic folded succession that crops out on a strip about 800 km long and 150 km wide in northwestern Argentina (Jujuy, Salta, Tucumán, Catamarca and La Rioja provinces). [...]
2003 - 10.1344/105.000001595
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 95-102  
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10.
10 p, 843.9 KB The Cambrian of the Iberian Peninsula : an overview / Gozalo, R. (Universitat de València. Departament de Geologia) ; Liñán, E. (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Palacios, T. (Universidad de Extremadura. Área de Paleontología) ; Gámez Vintaned, J.A. (Universidad de Zaragoza. Departamento de Ciencias de la Tierra) ; Mayoral, E. (Universidad de Huelva. Departamento de Geodinámica y Paleontología)
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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11.
7 p, 2.3 MB The demosponge Leptomitus cf. L. lineatus, first occurence from the Middle Cambrian of Spain (Murero Formation, Western Iberian Chain) / García-Bellido Capdevila, D. (Universidad Complutense de Madrid. Departamento de Paleontología) ; Consejo Superior de Investigaciones Científicas (Espanya)
The Middle Cambrian Murero Formation in the Iberian Chain (NE Spain) has yielded a small collection of softbodied fossils (palaeoscolecid worms, onychophorans, algae), a host of fossils from organisms with mineralized skeletons such as trilobites and brachiopods, and some trace fossils. [...]
2003 - 10.1344/105.000001597
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 113-119  
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12.
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. Departamento de Geología) ; Mayoral, E. (Universidad de Huelva. Departamento de Geodinámica y Paleontología) ; Gámez Vintaned, J.A. (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 Geodinámica y Paleontología)
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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13.
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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14.
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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15.
2 p, 461.5 KB Book Reviews / Arbizu, Miguel A. (Universidad de Oviedo. Departamento de Geología)
Obra ressenyada: Hans Ulrich ERNST and Frank RUDOLPH, Triboliten weltweit. Die Welt der Dreilapper und ihr Spiegelbild in der Philatelie = Trilobites worldwide. The world of trilobites and their Reflection in Philately. [...]
2003 - 10.1344/105.000001601
Geologica acta, Vol. 1, Núm. 1 (2003) , p. 145-146  
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16.
5 p, 469.6 KB Book Reviews / Labandeira, Conrad C. (Smithsonian Institution. National Museum of Natural History)
Obra ressenyada: W. WEITSCHAT and W. WICHARD, Atlas of Plants and Animals in Baltic Amber. Munich: Verlag Dr. Friedrich Pfeil, 2002.
2003
Geologica acta, Vol. 1 Núm. 1 (2003) , p. 146-150  
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