Yellowstone holds an older volcanic secret

Yellowstone has TWO separate volcanic systems.

Mike Poland explains that before the modern Yellowstone caldera formed 2.1 million years ago, the Absaroka Range was active 43 to 53 million years ago.

Yellowstone Has Two Different Volcano Systems

The largest above-water landslide on Earth happened here.

Ancient volcanic debris flows preserved dense petrified forests across Yellowstone and triggered the Heart Mountain slide, Earth's largest known above-water landslide.

Earth's Largest Landslide and Petrified Forests

Thermal monitoring at Steamboat Geyser indicates minor eruptive spikes, while Giant Geyser erupted twice during August.

Steamboat and Giant Geyser Activity Update

[00:00] Yellowstone Has Two Different Volcano Systems
[00:47] Earth's Largest Landslide and Petrified Forests
[02:32] Steamboat and Giant Geyser Activity Update

Yellowstone holds an older volcanic secret

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