Lagarcito Formation, Geological formation in San Luis Province, Argentina.
The Lagarcito Formation is a geological layer in San Luis Province composed of alternating sandstone and mudstone beds. These sedimentary deposits span across the western regions and reveal clear evidence of ancient depositional environments.
This formation developed during the Albian period through sedimentation in a shallow lacustrine environment set within a vast alluvial plain. The sequence of layers records transitions between aquatic and river-influenced depositional conditions across time.
Scientists from multiple research institutions conduct regular field studies at the formation to document fossil discoveries and geological characteristics.
Access to this site requires permits from local authorities and should be undertaken with knowledgeable guides familiar with the terrain. Basic supplies and equipment are essential due to the remote location and sparse nearby facilities.
This formation is renowned for its fossils of Pterodaustro guinazui, a winged reptile from the Cretaceous period. These discoveries provide crucial evidence of pterosaur presence in South America during that era.
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