The Culebra Formation (Tcb)[1] is a geologic formation in Panama.

It preserves fossils dating back to the Miocene period; Early Miocene epoch, Aquitanian to Burdigalian stages (Late Arikareean to Hemingfordian in the NALMA classification).

[2] Fossils of Culebrasuchus have been found in and named after the formation.

[3] The thickness of the formation is at least 250 metres (820 ft) thick,[4] and the age has been estimated as from 23 to 19 Ma.

[5]