Alcântara Formation

Alcântara Formation Stratigraphic range: Cenomanian
Type	Geological formation
Unit of	Itapecuru Group, São Luís Basin
Underlies	Cujupe Formation
Overlies	Undifferentiated Unit
Thickness	30–35 m (98–115 ft)
Lithology
Primary	Sandstone
Other	Claystone, carbonate
Location
Region	Maranhão
Country	Brazil
Type section
Named for	Alcântara (city)
Named by	Rossetti & Truckenbrodt (1997)

The Alcântara Formation is a geological formation in northeastern Brazil whose strata date back to the Upper Cretaceous.

Coringasuchus anisodontis

Laje do Coringa, Cajual Island

Early Cenomanian

Partial right lower jaw (dentary)

Possible a notosuchian.

Oxalaia quilombensis

Laje do Coringa, Cajual Island

Cenomanian

Fused premaxillae; isolated and incomplete left maxilla