Yellowstone National Park was established in 1872 and covers parts of Wyoming,Montana and Idaho.It is famous for its geothermal springs and geysers,such as the spectacular Old Faithful.These result from continuing volcanic activity under the area.The whole area is sitting over a series of calderas caused by a supervolcano the caldera is the crater left after a massive eruption in which the magma chamber is emptied rapidly and the ground above collapses into it.The supervolcano under Yellowstone is the result of a 'hotspot',a plume of molten lava rising from deep within the earth.About 2.2million years ago ,a massive explosion blew 2,500 km(600mi) of material into the air covering most of North America in ash .the park's stunning landscape is home to bison,bears,elk,American bald eagles and trumpeter swans.
Yellowstone National Park was established in 1872 and covers parts of Wyoming,Montana and Idaho.It is famous for its geothermal springs and geysers,such as the spectacular Old Faithful.These result from continuing volcanic activity under the area.The whole area is sitting over a series of calderas caused by a supervolcano the caldera is the crater left after a massive eruption in which the magma chamber is emptied rapidly and the ground above collapses into it.The supervolcano under Yellowstone is the result of a 'hotspot',a plume of molten lava rising from deep within the earth.About 2.2million years ago ,a massive explosion blew 2,500 km(600mi) of material into the air covering most of North America in ash .the park's stunning landscape is home to bison,bears,elk,American bald eagles and trumpeter swans.
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