America’s National Parks
Puzzle 33 · The Rocky Mountains · Page 53 in print
Yellowstone Geysers
Old Faithful’s average interval between eruptions is about 90 minutes, though it varies from 50 to 127 minutes.
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Thermophiles colour the margins of Yellowstone's thermal features.
NPS · Public domain (U.S. federal government work) · Original recordImage changes
Resized and converted to JPEG for display; no subject alteration.

Steam rises from Steamboat Geyser after an eruption.
NPS/Dave Krueger · Public domain (U.S. federal government work) · Original recordImage changes
Resized and converted to JPEG for display; no subject alteration.
The words
Beehive
Beehive Geyser, the cone geyser named for its beehive-shaped cone.
Biscuit Basin
Biscuit Basin, the hydrothermal basin containing Sapphire Pool.
Castle Geyser
Castle Geyser, the geyser with a cone resembling a ruined castle.
Firehole River
The Firehole River, the river beside Riverside Geyser.
Fumarole
A fumarole, a hydrothermal vent releasing steam and other gases.
Grand Geyser
Grand Geyser, the geyser that erupts in powerful bursts.
Great Fountain
Great Fountain Geyser, a named hydrothermal feature in Yellowstone.
Morning Glory
Morning Glory Pool, the hot spring named for its resemblance to the flower.
Norris
Norris Geyser Basin, the hydrothermal basin containing Steamboat Geyser.
Old Faithful
Old Faithful Geyser, the well-known erupting hydrothermal feature.
Paint Pots
Paint pots, the colorful mudpots produced by mineral-tinted mud.
Porcelain
Porcelain Basin, one of the two main areas of Norris Geyser Basin.
Steamboat
Steamboat Geyser, the tall and unpredictable geyser in Norris Geyser Basin.
Thermophiles
Thermophiles, the heat-loving organisms contributing colors to hot springs.
Travertine
Travertine, the calcium-carbonate rock deposited by Mammoth Hot Springs.
Sources
- Hydrothermal Features - Yellowstone National ParkNational Park Service
- Steamboat Geyser - Yellowstone National ParkNational Park Service
- Morning Glory PoolNational Park Service
- Norris Geyser Basin TrailsNational Park Service
- Mammoth Hot Springs and the North - Yellowstone National ParkNational Park Service