Facies y ambientes sedimentarios de la Formación Cancañiri (Silúrico inferior) en La Cumbre de La Paz, norte de la Cordillera Oriental de Bolivia

Abstract

Fades analysis of a continuous outcrop of the Cancaniri Formation (latest Ashgillian-Llandoverian) at La Cumbre (I<IE of La Paz, Bolivia) allowed for a thorough interpretation of sedimentary 'processes and environments envolved during its deposition. Distal turbidites and dark shales indicate a deep marine (offshore) environment, whereas interbedded mud flows, debris flows and deformed slided slabs provide evidence for sediment instability and resedimentation. Outsized granite clasts indicate local glaciation of the source area. Tectonic deformation and the resulting: reliefs may be identified, as the . origin for the instability and local glaciation, respectively