Kepperlites sp. Rierdon formation. Morrison Dome.
Kepperlites sp. Rierdon formation. Morrison Dome.
Lodgepole Canyon, Little Rocky Mountains
Lodgepole Canyon, Little Rocky Mountains
Mission Canyon, Little Rocky Mountains
Mission Canyon, Little Rocky Mountains
Badlands. Fort Union formation. Paleocene
Badlands. Fort Union formation. Paleocene
Badlands. Fort Union formation. Paleocene
Badlands. Fort Union formation. Paleocene
Little Missouri River in Badlands, Theodore Roosevelt Park
Little Missouri River in Badlands, Theodore Roosevelt Park
Large boulder in finer gravel. Flaxville formation
Large boulder in finer gravel. Flaxville formation
Badlands. Fort Union formation (Paleocene)
Badlands. Fort Union formation (Paleocene)
Burning coal seam. Fort Union formation
Burning coal seam. Fort Union formation
Missouri River near Wolf Point, Montana
Missouri River near Wolf Point, Montana
Clastic dike in Flaxville formation
Clastic dike in Flaxville formation
Collapse of overburden over burning coal seam
Collapse of overburden over burning coal seam
Burning coal seam. Fort Union formation.
Burning coal seam. Fort Union formation.
Dam in Frenchman Valley near Eastend, Sask.
Dam in Frenchman Valley near Eastend, Sask.
Frenchman Valley near Knollys, Sask.
Frenchman Valley near Knollys, Sask.
