Parks and grasslands of world
Yellowstone ParkYellowstone is the oldest and best-known national park in the USA. It was established by Act of Congress on March 1, 1872. It is one of the world’s largest parks covering 8987 sq km of rugged mountains and spectacular deep valleys. It is situated across Wyoming, Montana and Idaho.
|Yellow stone park in USA|
Yellowstone is famous for its lakes and rivers such as Yellowstone Lake and Snake River. Most of Yellowstone is forested in lodgepole pines, along with other conifers, cottonwoods and aspens. It also has a wealth of wild flowers. A Yellowstone sits on top of a volcanic hot spot which gives it its famous geysers' and hot springs - and may make it the site of the biggest eruption of all time. Yellowstone’s wild animals include bison, bighorn sheep, moose, grizzly bears and wolves. Yellowstone has 10,000 hot springs and 300 geysers, as well as steam vents, mud cauldrons, fumaroles and paint pots.
The most famous geyser is Old Faithful, which spouts every hour or so. The biggest is the 115 m Steamboat. One of the biggest volcanic eruptions ever occured in Yellowstone Park two million years ago. There are signs that Yellowstone may soon erupt as a ‘supervolcano’ - an eruption on an unimaginable scale.
Temperate grassland :The steppes are a vast expanse of temperate grassland, stretching right across Asia. ‘Steppes’ is a word for lowland.
The Western Steppe extends 4000 km from the grassy plains of the Ukraine through Russia and Kazakhstan to the Altai mountains on the Mongolian border.
The steppes extend 300-800 km from north to south. The Eastern Steppe extends 2500 km from the Altai across Mongoliato Manchuria in north China.
The Eastern Steppe is higher and colder than the Western Steppe and the difference between winter and summer is as extreme as anywhere on Earth. Nomadic herders have lived on the steppes for over 6000 years.
It was on the steppes near the Black and Caspian Seas that people probably first rode horses 5000 years ago. The openness of the steppes meant that travel by horse was easy long before roads were built.
Tropical grassland(The Gran Chaco):The Gran Chaco is an area of tropical grassland in Argentina, Paraguay and Bolivia.
It covers an area of over 720,00 sq km, an area as large as northwest Europe. It is home to scattered native Indian groups such as the Guaycuru, Lengua, Mataco, Zamuco and Tupi-Guarani people. The word Chaco comes from the Quechua Indian word for ‘Hunting Land’ because it is rich in wildlife. Gran is Spanish for ‘big’.
The major activities on the Chaco are cattle grazing and cotton growing. -4 The maned wolf is found in the South American grasslands and scrub forest of Brazil, northern Argentina, Paraguay and Bolivia In the east huge factories have been built to process tannin from the trees for leather production. In places grass can grow up to 3 m tall, higher than a rider on horseback. The jaguar is the Chaco’s biggest hunting animal, and the biggest cat in the America.
Yet unlike other big cats, it never roars. It just makes a strange cry rather like a loud sneeze.giant armadillos. The Chaco is the last refuge of the South American maned or red wolf. The Chaco is home to many wild animals, including pumas, tapir, rheas and The sediments under the Gran Chaco are well over 3000 m deep in places.