Taxonomy and biostratigraphy of Ordovician conodonts of the Devendeus Formation in the Angosto de La Quesera (Eastern Cordillera of Salta province, Argentina)

CARLOROSI, J., HEREDIA, S. AND ACEÑOLAZA, G.F.,

GEOLOGICA ACTA

UNIV BARCELONA

Año: 2011 vol. 9 p. 187 - 197

1695-6133

Conodonts recovered from the Devendeus Formation at the Angosto de La Quesera locality (Cordillera Oriental of Salta) in northwestern Argentina include Nogamiconus sp., Problematoconites perforatus, Drepanoistodus sp.,Nogamiconus sp., Problematoconites perforatus, Drepanoistodus sp., Oneotodus sp., Scolopodus filosus, Teridontus nakamurai and Variabiloconus sp., as a part of an association thatsp., Scolopodus filosus, Teridontus nakamurai and Variabiloconus sp., as a part of an association that defines a pre-Paltodus deltifer Zone. The material most likely represents the Cordylodus angulatus and/or the lower part of the Rossodus manitouensis Zone. These microfossils support the dating of the Devendeus Formation as Tremadocian (Early Ordovician). as Tremadocian (Early Ordovician). lower part of the Rossodus manitouensis Zone. These microfossils support the dating of the Devendeus Formation as Tremadocian (Early Ordovician). as Tremadocian (Early Ordovician). Paltodus deltifer Zone. The material most likely represents the Cordylodus angulatus and/or the lower part of the Rossodus manitouensis Zone. These microfossils support the dating of the Devendeus Formation as Tremadocian (Early Ordovician). as Tremadocian (Early Ordovician). Rossodus manitouensis Zone. These microfossils support the dating of the Devendeus Formation as Tremadocian (Early Ordovician).