Ocucaje was a zone of bays and islands with a calm sea and not too deep, this zone had a semi-tropical climate with palm trees and a great variety of animals There existed adecuate conditions for fosilization.
Nowadays it exists a whole desert full of skeletons of small whales, giant sharks, dolphins, seals, and even sea crocodriles lived in this area during the , the Cenozoico.
Nowadays when you walk through Ocucaje desert you wont avoid stepping over shark teeths disperse all over the area. You will also find cachalotes skeletons and a dopplhin brain fosilized on a setone.