Quitinozoos del Floiano (Ordovícico Inferior) del Área de Santa Victoria, Cordillera Oriental, noroeste argentino. Parte 2: Implicancias Bioestratigráficas, Paleobiogeográficas y Paleoambientales

Autor:	G. Susana de la Puente
Rok vydání:	2010
Předmět:	biology Lower ordovician Paleontology Acritarch Tetragraptus Chitinozoan Biostratigraphy biology.organism_classification Group (stratigraphy) Floian Assemblage (archaeology) Ecology Evolution Behavior and Systematics Geology
Zdroj:	Ameghiniana. 47:317-330
ISSN:	1851-8044 0002-7014
DOI:	10.5710/amgh.v47i3.7
Popis:	Floian chitinozoans (Lower Ordovician) from the Santa Victoria area, Cordillera Oriental, north-western Argentina. Part 2. Biostratigraphic, paleobiogeographic and paleoenvironmental implications. This is the first study of the Floian chitinozoans in the Acoite Formation exposed at Quebrada La Huerta and Quebrada Grande, Santa Victoria area, northeastern end of the Argentinian Cordillera Oriental (Salta Province). Biostratigraphic analysis of this group is calibrated with the graptolite zones Tetragraptus akzharensis, “Baltograptus deflexus” and Didymograptellus bifidus, previously established in the area and ranging from the latest early Floian to the late Floian. Chitinozoans are also calibrated with acritarchs that include some species of the messaoudensis-trifidum assemblage, among others. According to the most recent studies on chitinozoans conducted in Northwestern Argentina two biostratigraphically meaningful chitinozoan assemblages are proposed for the Santa Victoria area, i.e., Lagenochi...
Databáze:	OpenAIRE
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