The Lagarcito Formation is an Albian geologic formation in Argentina.

Pterosaur fossils have been recovered from the formation.

The sandstones and mudstones of the formation were deposited in a fluvial and mostly lacustrine environment.

[1] The fossil association and the geological evidence indicate that the Lagarcito Formation represents a perennial shallow lake situated in an alluvial plain where detrital sedimentation and semiarid climatic conditions predominated.

[2] The following fossils have been found in the Lagarcito Formation:[3]