The Hell Creek Formation is an intensively studied division of mostly Upper Cretaceous and some lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana. The formation stretches over portions of Montana, North Dakota, South Dakota, and Wyoming. In Montana, the Hell Creek Formation overlies the Fox Hills Formation. The site of Pompeys Pillar National Monument is a small isolated section of the Hell Creek Formation. In 1966, the Hell Creek Fossil Area was designated as a National Natural Landmark by the National Park Service.
Exposure in the badlands near Fort Peck Reservoir
Paleontological camp of Museum of the Rockies in eastern Montana – Hell Creek Formation (summer dig season 2009)
Dinosaurs and pterosaurs of Hell Creek Formation
View of Hell Creek State Park, the "heart" of Hell Creek Formation
Jordan is a town in and the county seat of Garfield County, Montana, United States. The population was 356 at the 2020 census. It is Garfield County's only incorporated community.
Intersection of Main Street and Jordan
A snapshot from Jordan, 2009