16Fossil sites
El Cien Formation
El Cien Formation in Mexico: 16 fossil sites. Typical age: 27–23 million years (Paleogene).
16Fossil sites
0Finds
27–23 million yearsTypical age
PaleogeneMain period
Where its fossils were found
Paleogene
By geological period
Paleogene16
Towns with the most fossil sites nearby
Other formations of the same period
Paleogene
Bateque Formation 34Indio Formation 32Laredo Formation 32Tepetate Formation 21Midway Formation 19Jackson Formation 12Mount Selman Formation 10Yegua Formation 10Sepultura Formation 10San Juan Formation 9Huasteca Formation 9Mesón Formation 6Alazán Formation 6Adjuntas Formation 5Palma Real Formation 5San Gregorio Formation 4Rancho Nuevo Formation 4Yolomécatl Formation 4Carrizo Sand Formation 3