La biozona de Paraglossograptus tentaculatus (Graptolithina) en la Formacion Sierra de La Invernada, Precordillera Occidental, Argentina

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• 作者：Edsel Daniel Brussa
• 关键词：Graptolites ; Biostratigraphy ; Ordovician ; Sierra de La Invernada Formation ; Western precordillera ; Argentina
• 刊名：Geobios
• 出版年：1997
• 出版时间：1997
• 年：1997
• 卷：30
• 期：1
• 页码：15-29
• 全文大小：1418 K

文摘

The Paraglossograptus tentaculatus Biozone from the Sierra de La Invernada Formation, western Precordillera of Argentina, is recognized. This biozone is divided into a lower part and an upper part based on their associations. The outcrops suggest an Upper Arenig - Lower Llanvirn age. The vertical distribution of the taxa, fossil associations, local and intercontinental correlation, and the palaeogeographic aspects are discussed.