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建立人际资源圈Geologic_History_Of_Washington_State
2013-11-13 来源: 类别: 更多范文
Geologic History Of Washington State
Washington State has a very interesting geologic history as does the rest of the Pacific Northwest. What does not seem as a hot bed for volcanoes is, and has been for millions upon millions of years. This area has also seen its fair share of earthquakes rattle and bring the area to a halt. In contrast, the land is also in a rebuilding state, as new mountains are springing up. Many different agents have gone into the sculpting of this state, and many more are continuing to act on it to bring another new shape to the land.
Geologic history of Washington stretches back more than a billion years and has survived through violent volcanic eruptions, large-scale earthquakes and even an Ice Age which gave the land much of its current look. Around 1.2 billion years ago, the lands on Earth began to push together and plate tectonics created a giant continent known as Rodinia, which is Russian for homeland. This was the dominant landmass of Earth for nearly 350 million years. Western North America used to lie next to what is now Australia and Antarctica. This world was a dark and hostile
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