The Mesa Falls Tuff is a

tuff Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock ...

formation created by the Mesa Falls eruption that formed the

Henry's Fork Caldera The Henry's Fork Caldera in eastern Idaho is a caldera located in an area known as Island Park, west of Yellowstone National Park. The caldera was formed by an eruption 1.3 million years ago of the Yellowstone hotspot. The eruption distributed ...

that is located in

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyomi ...

west of

Yellowstone National Park Yellowstone National Park is an American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho. It was established by the 42nd U.S. Congress with the Yellowst ...

. It is the second most recent caldera forming eruption from the

Yellowstone hotspot The Yellowstone hotspot is a volcanic hotspot in the United States responsible for large scale volcanism in Idaho, Montana, Nevada, Oregon, and Wyoming, formed as the North American tectonic plate moved over it. It formed the eastern Snake Riv ...

and ejected of of material. This eruption, 1.3 million years BP, was preceded by the

Huckleberry Ridge Tuff The Huckleberry Ridge Tuff is a tuff formation created by the Huckleberry Ridge eruption that formed the Island Park Caldera that lies partially in Yellowstone National Park, Wyoming and stretches westward into Idaho into a region known as Island ...

and succeeded by the

Lava Creek Tuff The Lava Creek Tuff is a tuff formation in Wyoming, Montana and Idaho, United States, created during the Lava Creek eruption around 630,000 years ago, which formed the Yellowstone Caldera. The Lava Creek Tuff is distributed in a radial pattern ar ...

, both of which were also created by the

.Yellowstone Caldera, Wyoming
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References

Yellowstone hotspot Volcanism of Idaho Volcanism of Wyoming Geologic formations of Wyoming Geologic formations of Idaho Landforms of Yellowstone National Park Quaternary Idaho Quaternary Wyoming Tuff formations VEI-7 eruptions Volcanic eruptions in the United States Plinian eruptions Pleistocene volcanism {{Wyoming-geologic-formation-stub

See also

References