deep lacustrine system with deltaic facies in the middle and upper parts. The Collón Curá Formation is correlated with the contemporaneous fluvial and lacustrine tuffaceous Chichinales Formation of the central Neuquén Basin.

The Collón Curá Formation, together with the underlying Ñirihuau Formation in the Cañadón Asfalto Basin, was deposited in a fragmented, possibly