The Indio Formation is a geologic formation of the Wilcox Group in Mexico. The sandstones,

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especial ...

s, conglomerates and claystones preserve

fossils A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...

dating back to the Ypresian age ( Wasatchian to Bridgerian in the NALMA classification) of the Eocene epoch of the

Paleogene The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million yea ...

period.Indio Formation
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ...

.org

References

{{reflist Geologic formations of Mexico Paleogene Mexico Eocene Series of North America Ypresian Stage Bridgerian Wasatchian Sandstone formations Shale formations Conglomerate formations Shallow marine deposits Formations Formations

See also

References