Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 Page 32 Page 33 Page 34 Page 35 Page 36 Page 37 Page 38 Page 39 Page 40 Page 41 Page 42 Page 43 Page 44 Page 45 Page 46 Page 47 Page 48 Page 49 Page 50 Page 51 Page 52 Page 53 Page 54 Page 55 Page 56 Page 57 Page 58 Page 59 Page 60Saratoga Hot Springs Emigrants’ Washtub Big Spring Yellowstone geothermal features Alcova Hot Spring Geothermal features ≥ 122 degrees Fahrenheit < 122 degrees Fahrenheit Not all geothermal features are shown Geothermal features 12 Grand Prismatic hot spring inYellowstone (pictured to the left) is the largest hot spring in North America and third largest in the world. The spring pumps out an estimated 560 gallons of 160 °F water per minute. Emigrants’ Washtub is a warm spring near Fort Laramie which was often used by travelers along the Oregon Trail for washing their dirty clothes. After the Union Pacific Railroad was completed in early 1860s, the spring diminished in importance as a landmark, and today is used mostly by thirsty cattle instead. Geothermal features are created and sustained by the internal heat of the Earth. Wyoming has the largest number of geothermal features in the United States, with an estimated 10,000 in Yellowstone National Park alone. Old Faithful, a cone geyser inYellowstone (shown below), is famously predictable, erupting every 60 to 110 minutes. The formation of geysers is due to groundwater coming into contact with magma. The water becomes super-heated and the resulting pressure forces a column of steam and water to the surface. In addition to geysers,Wyoming has other types of geothermal features including fumaroles (steam vents), hot springs, mudpots (hot springs with limited water), and travertine terraces (white chalky deposits of calcium carbonate). Data Go Interactive