English Harebell Formation Cited by user Harold9595959 on 30 Oct 2023 The Harebell Formation is a Late Cretaceous (Maastrichtian) geologic formation in Wyoming which outcrops in parts of the Yellowstone National Park.
English Pinyon Conglomerate Cited by user Harold9595959 on 30 Oct 2023 The Pinyon Conglomerate is a geological formation in Wyoming whose strata date back to the Late Cretaceous and Paleocene.