Country United States Named by W. C. Knight, 1902 | Other shale Extent see text | |
Sub-units Torchlight Sandstone Member, Peay Sandstone Member Overlies | ||
Battle nations frontier formation
The Frontier Formation is a sedimentary geological formation whose strata date back to the Late Cretaceous. The formation's extents are: northwest Colorado, southeast Idaho, southern Montana, northern Utah, and western Wyoming. It occurs in many sedimentary basins and uplifted areas.
Contents
The formation is described by W.G. Pierce as thick, lenticular, grey sandstone, gray shale, carbonaceous shale, and bentonite.
Dinosaur remains are among the fossils that have been recovered from the formation.
Vertebrate paleofauna
References
Frontier Formation Wikipedia(Text) CC BY-SA