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John Clelend, Samuel Johnson,and Isaac newton

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15y ago

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Which period was 300 million years ago?

There was one spercontinent called Pangaea, which consists of all of the current continents joined together. It existed until 250 million years ago, where it splitted up into Laurasia and Gondwanaland, and further splitted into the current seven continents.


Which year did earth born on?

The Earth is believed to have coalesced as a solid body roughly 4.5 billion years ago.


What was the earth called a long time ago when the plates were together?

The ancient supercontinent that existed when Earth's plates were together is called Pangaea. This supercontinent is believed to have formed about 300 million years ago and began to break apart around 175 million years ago.


What volcano is by the cascade mountans?

The Cascade Mountains are littered with volcanoes including: Mt. Saint Helens (last erupted 1980) Lassen Peak (last erupted 1914-1917) Mount Meager (last eruption about 2350 years ago) Mount Mazama (last eruption about 7700 years ago) Glacier Peak (last eruption around 200-300 years ago) Mt. Baker (last erupted during the mid-1800's) Mt. Rainier (last erupted during the late 1800's) Mt. Cayley (last eruption about 20,000 years ago) Mt. Garibaldi (last eruption about 9300 years ago) Mt. Adams (last active about 1000 years ago) Mt. Hood (last active about 200 years ago) Medicine Lake Volcano (last active about 1000 years ago) Mt. Shasta (last erupted 1786 - has been erupting about every 300 years for the last 4000 years)


Which of these was given the name Pangaea?

The supercontinent that existed about 300 million years ago and eventually split into the continents we recognize today was named Pangaea.