Santa Fe Group (geology)

Santa Fe Group
Stratigraphic range: Oligocene to Pleistocene, 26–1 Ma
Los Barrancos, New Mexico, underlain by Santa Fe Group beds
TypeGroup
Sub-unitsSee text
OverliesEspinaso Formation
Thickness5,000 m (16,000 ft)
Lithology
PrimarySiltstone
OtherSandstone, conglomerate
Location
RegionNew Mexico
Colorado
Country United States
ExtentRio Grande rift
Type section
Named forSanta Fe, New Mexico
Named byHayden
Year defined1869

The Santa Fe Group is a group of geologic formations in New Mexico and Colorado. It contains fossils characteristic of the Oligocene through Pleistocene epochs. The group consists of basin-filling sedimentary and volcanic rocks of the Rio Grande rift, and contains important regional aquifers.