3Fossil sites
Açu Formation
Açu Formation in Brazil: 3 fossil sites. Typical age: 113–94 million years (Cretaceous).
3Fossil sites
19Finds
113–94 million yearsTypical age
CretaceousMain period
Where its fossils were found
Cretaceous
By geological period
Cretaceous3
What was found
Dinosaurs · 19Tiamat
Towns with the most fossil sites nearby
Other formations of the same period
Cretaceous
Cotinguiba Formation 407Riachuelo Formation 141Crato Formation 88Adamantina Formation 66Sousa Formation 41Muribeca Formation 38Romualdo Formation 36Serra da Galga Formation 21Marília Formation 20Antenor Navarro Formation 12Agua Doce Formation 12Botucatu Formation 11Alcântara Formation 10Algodoes Formation 10Rio Piranhas Formation 8Presidente Prudente Formation 7Uberaba Formation 7Gramame Formation 7São José do Rio Preto Formation 7Codó Formation 6Jandaíra Formation 6Quiricó Formation 6Queimadas Formation 6Preguicas Formation 6