In 1925, a hydrothermal explosion reshaped Yellowstone’s Biscuit Basin; 101 years later, USGS reconstructed from 1926 letters how a misplaced ‘Black Pearl’ sign shifted the story 1,000 feet from the real geyser
In 1925, a hydrothermal explosion reshaped Yellowstone’s Biscuit Basin (Image Credit: U.S. Geological Survey) A century-old mystery at Yellowstone’s Biscuit Basin has turned out to be less about a missing geyser and more about a misplaced sign. In 1925, a hydrothermal explosion dramatically altered part of the basin, but because nobody witnessed the event, the…
