The area covers 2,658 hectares and its sediments are divided into four geological formations, dating from the late Cretaceous period.
During the winter season the area receives more than 900 mm of rain that change the landscape considerably, making the visit interesting also in these months.
This sea dried up, populated with forests and animals, organisms that after hundreds of years, due to great natural events were buried underground.
Finally, by geological movements typical of the Earth's crust, these remains came to the surface again forming an invaluable sample of the remote past of the planet.
There are also fossils of leaves corresponding to four genera of primitive plants resembling the present ferns and palms.