Led by: Dr. Susana Heredia, Dr. Ana Mestre, Dr. Josefina Asurmendi, Dr. Fernando López, Dr. Juan M. Drovandi
Poblete Norte Creek, located on the western flank of the Sierra de Talacasto, represents a key outcrop for analyzing the architecture and evolution of the Ordovician and Silurian successions in the Precordillera.
This field trip, organized within the framework of the XXIII Argentine Geological Congress, offers a comprehensive approach to the San Juan, La Chilca, and Los Espejos formations, integrating stratigraphic, sedimentological, and paleontological analyses, with particular emphasis on biostratigraphy.
Throughout the excursion, the main lithofacies, stratigraphic surfaces, and contact relationships will be examined, discussing their significance in terms of basin dynamics, tectonic controls, and eustatic variations. Biostratigraphic analysis based on conodonts and graptolites will provide a high-resolution chronological framework, enabling calibration of regional events and recognition of changes in faunal diversity and distribution throughout the Ordovician and Silurian.
In addition, the paleoenvironmental and paleoecological implications of fossil assemblages will be assessed, including variations in water depth, oxygenation conditions, and trophic structure.
This proposal offers participants the opportunity to discuss evolutionary models and regional correlations in situ, providing conceptual tools applicable to the study of comparable Paleozoic successions.
