CICTERRA 20351
CENTRO DE INVESTIGACIONES EN CIENCIAS DE LA TIERRA
Unidad Ejecutora - UE
artículos
Título:
New records of late Tremadocian (Early Ordovician) conodonts and graptolites from the Eastern Cordillera, Jujuy Province, Argentina.
Autor/es:
ZEBALLO F.J., ALBANESI G.L. & ORTEGA G.
Revista:
Geologica Acta
Referencias:
Lugar: Barcelona; Año: 2008 vol. 6 p. 131 - 145
ISSN:
1695-6133
Resumen:
New late Tremadocian (Early Ordovician) conodont and graptolite faunas from the eastern and central belts ofthe Eastern Cordillera (Jujuy Province, northwestern Argentina) are reported. The conodont fauna includes theguide species Paltodus deltifer pristinus, Paltodus deltifer deltifer, and Acodus deltatus (sensu lato), in associationwith other taxa, and the graptolites Aorograptus victoriae, Ancoragraptus cf. bulmani, and Adelograptus cf.altus. Overlapping ranges of the recorded species allow for a partial correlation between the Acodus deltatus-Paroistodus proteus and Aorograptus victoriae zones, and the Notopeltis orthometopa trilobite Zone. The conodontfauna includes a mixture of forms typical of the Baltoscandian and Laurentian provinces, respectively. TheEarly Ordovician basin of northwestern Argentina may correspond to the Shallow-Sea Realm and Cold Domainand probably records the development of a differentiated conodont province in the southern South Americanmargin of Gondwana.
