GEYSERS & HOT SPRINGS

​​“Yellowstone is a gigantic pressure cooker, fueled by one of the most massive super volcanoes on Earth.  Water from rain and snowmelt, much of it centuries-old, percolates down through cracks in the Earth’s crust.  The water is heated by magma reservoirs to well over the surface boiling point, but remains in a liquid state because of the pressure of overlying rock and colder water.  The superheated water filters upward, eventually finding release in the thousands of geysers, hot springs, and other hydrothermal wonders that have awed visitors since the expeditions to Yellowstone in the late 19th century.”
                                                                         National Geographic, “In the Hot Zone” 

​Click on a photo to enlarge it.

Old Faithful erupts about every 90 minutes and spouts about 8000 gallons of water as high as 180 feet.
The water is about 204°F and the steam is about 350​°F.

Old Faithful Seen from Above

Castle Geyser

Fumaroles steam all over.

Hot Spring Erupting

Excelsior Geyser empties more than 4,000 gallons of boiling water into Firehole River every minute.

Grand Prismatic Spring 1

Grand Prismatic Spring 2

Crested Pool, Upper Geyser Basin

Hot Springs on Mountain

Mammoth Hot Springs#1

Mammoth Hot Springs #2

Mammoth Hot Springs #3

Roaring Mountain