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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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