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How Was the Grand Canyon Formed?
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232 Visninger·
03/12/22
In the 19th century, many people believed that landscapes like the Grand Canyon were shaped by volcanoes and earthquakes. But one American geologist named John Newberry had different ideas.
From: AERIAL AMERICA: Natural Wonders
http://bit.ly/1TgPbSx
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sparctv
452 Visninger · 05/31/22
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