Yellowstone National Park is the oldest national park. It was established by Congress and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone is the site of a huge ancient volcano, whose remains are called the
Yellowstone Caldera. The caldera is the largest volcanic system in North America. 640,000 years ago a huge volcanic explosion blew 240 cubic miles of rock and lava into the air. It was 1000 times larger than the Mount St. Helens eruption. Yellowstone is still a geologically active volcano (that means that a eruption is expected in future). There is ground movement and small earthquakes happening quite often. In fact, right now Researchers have recorded more than 1200 earthquakes in Yellowstone, part of an ongoing earthquake swarm now in its fifth week. The floor of the caldera has been rising, but experts say there is no immediate danger of eruption.
Today we drove through several areas of Yellowstone. We saw some pretty cool things.
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A Bison taking a stroll along the road.
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A Thermal Pool |
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Two female Elk hanging out by the River
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Snow capped mountains overlooking a lake
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