The formation consists of calcareous lithic and fossiliferous sandstones, siltstones and mudstones.

The Jimol Formation dates to the Neogene period; Burdigalian stage, Santacrucian in the SALMA classification, and has a maximum thickness of 203 metres (666 ft).

[1] The Jimol Formation consists of calcareous lithic and fossiliferous sandstones, siltstones and mudstones.

The age has been estimated to be Early Miocene (17.9 to 16.7 Ma), corresponding to the Santacrucian in the SALMA classification.

This unit is correlated with the upper Agua Clara and lower Cerro Pelao Formations of the Venezuelan Falcón Basin.