TREMADOCIAN TRILOBITE ASSEMBLAGES FROM THE ARGENTINE CORDILLERA ORIENTAL. A PRELIMINARY ANALYSIS

BALSEIRO, D.; MARENGO, L.

Advances in Trilobite Research

INSTITUTO GEOLÓGICO Y MINERO DE ESPAÑA

Año: 2008; p. 33 - 40

Here we present preliminary results of a large-scale study dealing with trilobite assemblages, palaeoecology, and biotic events throughout the Santa Rosita Formation (Late Cambrian-Tremadocian), in Northwestern Argentina. Due to the complex stratigraphic and tectonic history of this unit a diverse mosaic of trilobite biofacies is recorded. This contribution focuses on a detailed survey at a single locality (Arenal Creek, Huacalera, Jujuy) of a succession of trilobite assemblages. Main controls on their composition and distribution are briefly discussed.