GEOLOGY

Detailed explanation-1: -The Yellowstone caldera was created by a massive volcanic eruption approximately 631, 000 years ago. Later lava flows filled in much of the caldera, now it is 30 x 45 miles. Its rim can best be seen from the Washburn Hot Springs overlook, south of Dunraven Pass.

Detailed explanation-2: -Yellowstone erupts two different types of magma, rhyolite and basalt. Rhyolite magmas are the most famous at Yellowstone, as these can be very explosive. In fact, it was a large eruption of rhyolite that produced present-day Yellowstone caldera.

Detailed explanation-3: -In fact, the Yellowstone Plateau hosts three separate calderas, the youngest being the “Yellowstone Caldera".

Detailed explanation-4: -The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States.

Detailed explanation-5: -Yellowstone Caldera The Yellowstone eruption area collapsed upon itself, creating a sunken giant crater or caldera 1, 500 square miles in area. The magmatic heat powering that eruption (and two others, dating back 2.1 million years) still powers the park’s famous geysers, hot springs, fumaroles, and mud pots.