Yellowstone (1978)
United States of America

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United Nations (Geneva) 2001. Yellowstone National Park.

The vast natural forest of Yellowstone National Park covers nearly 9,000 sq. km; 96% of the park lies in Wyoming, 3% in Montana and 1% in Idaho. Yellowstone contains half of all the world's known geothermal features, with more than 10,000 examples. 

It also has the world's largest concentration of geysers (more than 300 geysers, or 2/3 of all those on the planet). Established in 1872, Yellowstone is equally known for its wildlife, such as grizzly bears, wolves, bison and wapitis. 

  • United Nations (Geneva) 2003. Yellowstone National Park. 

Yellowstone was the world's first national park. It is one of the largest wildlife sanctuaries in the United States. Among the more than 300 animal species found here are grizzly bears, elk, deer, antelope, moose, bighorn sheep, coyotes, and lynx. 

During the summer, thousands of wapiti, or American elk, graze in the park. More than 1,300 bison, which almost became extinct in the park, roam the eastern sections. Wolves, once thought to be a menace, were reintroduced to the park in 1995 after being hunted and trapped to the brink of extinction early in the 20th century. 

Nearly 300 species of birds, including bald eagles, osprey, white pelicans, California gulls, and Canada geese, either live in or visit the park. The rare trumpeter swan also frequents the area and is protected within the park. 

  • USA 1981. A selection of Wild Life in Yellowstone. The stamps are from a booklet pane, and are arranged in order of appearance in the pane.
    • Bighorn
    • Puma
    • Harbour Seal.
    • American Bison. 
    • Brown Bear.
    • Polar Bear. 
    • Elk (Wapiti).
    • Moose. 
    • White-tailed Deer.
    • Pronghorn. 

USA 1972. National Parks Centennial. Set of four, depicting the Laughing Gull. Stamp #1. USA 1972. National Parks Centennial. Set of four, depicting the Laughing Gull. Stamp #2.
USA 1972. National Parks Centennial. Set of four, depicting the Laughing Gull. Stamp #3. USA 1972. National Parks Centennial. Set of four, depicting the Laughing Gull. Stamp #4.

  • USA 1972. National Parks Centennial. Set of four, depicting the Laughing Gull. 
USA 1981. Bighorn. USA 1981. Puma.
USA 1981. Harbour Seal. USA 1981. American Bison.
USA 1981. Brown Bear. USA 1981. Polar Bear.
USA 1981. Elk (Wapiti). USA 1981. Moose.
USA 1981. White-tailed Deer. USA 1981. Pronghorn.

The geysers of Yellowstone are grouped in basins located in the western half of the park. These include Norris, West Thumb, Lower, Midway, and Upper geyser basins. 

The most famous geyser is Old Faithful, which erupts on the average of every 75 minutes for up to 5 minutes, shooting a column of steam and hot water as high as 50 m (170 ft). About 38,000 to 45,000 liters (about 10,000 to 12,000 gallons) of water are expelled at each eruption. 

Other geysers include the Giant, which erupts at irregular intervals, throwing out a jet of hot water up to 60 m (200 ft) high; and the Giantess, which erupts for more than four hours, about twice a year. Steamboat Geyser, the world’s tallest geyser, erupts infrequently but as high as 120 m (380 ft). 

Riverside Geyser is one of the most dependable and unusual of the park’s geysers. It sends an arching spray of water over the Firehole River every six to nine hours. Sapphire Geyser, formerly a hot pool, erupted violently after the 1959 earthquake but gradually became dormant and has not experienced a true eruption since 1971. Other notable geysers include Daisy, Grand, Porkchop, and Great Fountain. 

  • USA 1934. Old Faithful, Yellowstone National Park, Wyoming. The stamp is part of the National Parks Issue.  

USA 1934. Yellowstone National Park. Old Faithful Geyser

The park contains more hot springs than geysers. Mineral deposits from the waters of the hot springs have formed cones and terraces on some of the surrounding ground. The most striking example is Mammoth Hot Springs, where the waters flow over terraces as high as 90 m (300 ft). Algae and bacteria thrive in the pools of warm water that collect on the terraces, giving the terraces brilliant colors. 

Sources and links: 

Other World Heritage Sites in USA (on this site). Inactive links are not described on stamps. Please refer to the UNESCO-listing, section United States for further information about such sites. 

 

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Revised 03 aug 2006  
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