15.5 Ma). See also Timeline of volcanism on Earth Notes References Map references Further reading External links Yellowstone hotspot interactive National Park Service interactive map showing trace of the hotspot over time The Yellowstone magmatic system from the mantle plume to the upper crust (46,000 km3 magma reservoir below chamber) Hotspots of North America Volcanism of the Rocky Mountains Volcanism of Idaho Volcanism of Montana Volcanism of Nevada Volcanism of Oregon Volcanism of Washington (state) Volcanism of Wyoming Volcanism of Yukon Landforms of Yellowstone National Park Cretaceous volcanism Paleocene volcanism Eocene volcanism Miocene volcanism Pliocene volcanism Pleistocene volcanism Holocene volcanism Paleogene Idaho Paleogene Montana Paleogene geology of Oregon Paleogene geology of Washington (state) Paleogene geology of Wyoming Neogene Idaho Neogene Montana Neogene geology of Nevada Neogene geology of Oregon Neogene geology of Wyoming Paleocene North America Eocene North America Pleistocene North America Holocene North America Cretaceous United States Miocene United States Pliocene United States Pleistocene United States Quaternary Idaho Quaternary Nevada Quaternary Wyoming Quaternary United States Geological hazards