hydrothermal explosion
Definition
A violent geothermal event occurring when superheated water trapped beneath the Earth's surface abruptly flashes into steam, causing a rapid expansion that shatters confining rock and ejects debris like mud, water, and boulders.
A geological phenomenon often occurring in volcanic regions like Yellowstone, where pressure buildup in subsurface reservoirs leads to sudden, unpredictable surface eruptions.
Examples
Watching the tourists at Biscuit Basin scramble away from the mud-caked eruption, one realizes that a hydrothermal explosion provides a much more effective workout than any gym membership.
If you are looking to freshen up your wardrobe with a coat of pressurized prehistoric muck, being near a hydrothermal explosion is infinitely more efficient than a trip to your local boutique.
Scientists are using luminescence dating to study past hydrothermal explosions, mostly because the Earth refuses to keep a tidy calendar of the times it decided to spray boiling mud at unsuspecting hikers.