The fossils of Bachea huilensis were reported to have been found in the La Frontera Formation of the Villeta Group, a formation dating to the Turonian.
As the mosasaur Yaguarasaurus columbianus, reported from the same formation, the La Frontera Formation has not been mapped south of Cundinamarca.
The time-equivalent formations of the La Frontera Formation, which is restricted to the central Eastern Ranges of the Colombian Andes, are the Hondita and Loma Gorda Formations (pertaining to the Güagüaquí Group) from the south-central Upper Magdalena Valley and surrounding Eastern and Central Ranges.
These formations were deposited in a relative highstand sequence with an oceanic oxygen depletion event in the seaway present in the Late Cretaceous in northwestern South America.
Other fossil fish found from this period are Pachyrhizodus etayoi also from Turonian Huila, and Candelarhynchus padillai from the San Rafael Formation, which is also rich in ammonite fauna and preserves crustaceans.

The Turonian to early Coniacian Loma Gorda Formation has provided many genera of ammonites, while the underlying Hondita Formation is poorer in these cephalopods and probably dates to the Cenomanian.
The fossils of Bachea huilensis were reported to have been found in the La Frontera Formation of the Villeta Group, a formation dating to the Turonian. As the mosasaur Yaguarasaurus columbianus, reported from the same formation, the La Frontera Formation has not been mapped south of Cundinamarca. The time-equivalent formations of the La Frontera Formation, which is restricted to the central Eastern Ranges of the Colombian Andes, are the Hondita and Loma Gorda Formations (pertaining to the Güagüaquí Group) from the south-central Upper Magdalena Valley and surrounding Eastern and Central Ranges. These formations were deposited in a relative highstand sequence with an oceanic oxygen depletion event in the seaway present in the Late Cretaceous in northwestern South America. Other fossil fish found from this period are Pachyrhizodus etayoi also from Turonian Huila, and Candelarhynchus padillai from the San Rafael Formation, which is also rich in ammonite fauna and preserves crustaceans.
The Turonian to early Coniacian Loma Gorda Formation has provided many genera of ammonites, while the underlying Hondita Formation is poorer in these cephalopods and probably dates to the Cenomanian.
Bachea