Indio Formation

The Indio Formation is a geologic formation of the Wilcox Group in Mexico. The sandstones, shales, conglomerates and claystones preserve fossils dating back to the Ypresian age (Wasatchian to Bridgerian in the NALMA classification) of the Eocene epoch of the Paleogene period.^[1]

Indio Formation
Stratigraphic range: Ypresian (Wasatchian-Bridgerian) ~55–48 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Unit of	Wilcox Group
Lithology
Primary	Sandstone, shale
Other	Conglomerate, claystone
Location
Region	Nuevo León and Tamaulipas
Country	Mexico