Resumen de Trazas de trilobites en los estratos del Ordovícico basal de la Puna Argentina

Florencio Gilberto Aceñolaza, Felipe R. Durand

• Trilobite traces on basal Ordovician Layers from the Argentine Puna.· In this paper the ichnofauna from Guayoc Chico Formation from the Cangrejillos area is described. The association contains Cruziana semiplicata, C. sp. aff. C. breadstoni, Rusophycus sp. and cf. Phycodes.

  These trace fossils indicate Lower Ordovician age.