Scientists in Wyoming have discovered evidence of two mysterious volcanic eruptions that are older than the last caldera-forming supereruption at Yellowstone.
The ash deposits were buried beneath the Lava Creek Tuff, a large, white-ish mass of compacted volcanic ash formed from the last giant Yellowstone eruption 631,000 years ago. The origins of the newfound ash deposits are a mystery, but researchers hope to have answers by fall 2025, when they expect to receive test results from the samples.
