The formation consists of calcareous mudstones interbedded with lithic sandstones.

The Uitpa Formation dates to the Neogene period; Aquitanian to Burdigalian stages, corresponding to the Colhuehuapian in the SALMA classification, and has a maximum thickness of 230 metres (750 ft).

[1] The Uitpa Formation consists of calcareous mudstones interbedded with lithic sandstones.

The age has been estimated to be Early Miocene, corresponding to the Colhuehuapian in the SALMA classification.

The formation has been deposited in an open to deep marine environment.