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- Aug 17, 2026earliest in window
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News
Caps, trash, and other hydrothermal funky finds: 2026 edition
2+ hour, 32+ min ago (320+ words) Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Margery Price, Physical Science Technician with the Yellowstone National Park Geology Program. Hats: With more than 280 hats collected…...
Yellowstone, Redstone, Greenstone, Blueschist—what makes rocks so colorful?
2+ week, 2+ hour ago (130+ words) Rocks have a variety of colors that result from the minerals and chemical elements they contain and from their internal structure. Some names of rocks and stones reflect their color. That’s why Yellowstone is called Yellowstone! Yellowstone Caldera Chronicles is…...