Yellowstone National Park黄石公园英文介绍.ppt

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;Yellowstone National Park;Yellowstone National Park spans an area of 3,472 square miles (8,987 km2), comprising lakes, canyons, rivers and mountain ranges. Yellowstone Lake is the largest high-altitude lake in North America and is centered over the Yellowstone Caldera, the largest supervolcano on the continent. The caldera is considered an active volcano; it has erupted with tremendous force several times in the last two million years. Half the worlds geothermal features are in Yellowstone, fueled by this ongoing volcanism. Lava flows and rocks from volcanic eruptions cover most of the land area of Yellowstone. ;Hundreds of species of mammals, birds, fish and reptiles have been documented, including several that are either endangered or threatened. The vast forests and grasslands also include unique species of plants. Common animals in the park include grizzlies, wolves, and free-ranging herds of bison and elk. Forest fires occur in the park each year; in the large forest fires of 1988, nearly one third of the park burned. Yellowstone has numerous recreational opportunities, including hiking, camping, boating, fishing and sightseeing. Paved roads provide close access to the major geothermal areas as well as some of the lakes and waterfalls. During the winter, visitors often access the park by way of guided tours that use either snow coaches or snowmobile. ;Tourist Map of the Yellowstone National Park ;Attractions;;Tower Fall ;Yellowstone River ;Grand Canyon Of The Yellowstone ; Geyser Basin ;Mammoth Hot Springs ;Sunset Lake;Animals;;;;;;;;;;;Thank you

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