Culebra Formation

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]

Culebra Formation
Stratigraphic range: Aquitanian-Burdigalian (Late Arikareean-Hemingfordian) 23–19 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Formation
Sub-units	Emperador Limestone
Underlies	Cucaracha Formation
Overlies	Las Cascadas Formation
Thickness	> 250 m (820 ft)
Lithology
Primary	Sandstone, limestone, mudstone, shale
Other	Siltstone, conglomerate, lignite
Location
Coordinates	9.1°N 79.7°W / 9.1; -79.7
Approximate paleocoordinates	8.4°N 77.5°W / 8.4; -77.5
Region	Colón Province
Country	Panama
Extent	Panama Basin
Type section
Named for	Culebra Cut
Culebra Formation (Panama)

Fossil content

• Culebrasuchus mesoamericanus^[3][6]
• Culebratherium alemani^[7]
• Dentimides^[8]
• Panamacebus transitus^[9][10]
• Paratoceras orarius^[11]
• Purussaurus
• Podocnemididae indet.^[12]

See also

• List of fossiliferous stratigraphic units in Panama
• Cucaracha Formation
• Gatún Formation