Bacolet Formation
Stratigraphic range: Albian
Type	Formation
Unit of	Tobago Volcanic Group
Lithology
Primary	Mudstone
Other	Volcaniclastic sandstone & siltstone
Location
Coordinates	11°12′N 60°48′W / 11.2°N 60.8°W / 11.2; -60.8
Approximate paleocoordinates	5°36′N 32°36′W / 5.6°N 32.6°W / 5.6; -32.6
Region	Tobago
Country	Trinidad and Tobago
Type section
Named for	Bacolet
Bacolet Formation (Trinidad and Tobago)

The Bacolet Formation is a geologic formation in Trinidad and Tobago. It preserves radiolaria and ammonite fossils dating back to the Albian period. The formation is part of the Tobago Volcanic Group and comprises organic-rich, black pyritic siliceous mudstones and fine-grained volcaniclastic sandstones and siltstones.^[1]

• List of fossiliferous stratigraphic units in Trinidad and Tobago

• A. W. Snoke and P.J. Noble. 2001. Ammonite-radiolarian assemblage, Tobago Volcanic Group, Tobago, West Indies—Implications for the evolution of the Great Arc of the Caribbean. Geological Society America Bulletin 113:256-264