Science girl 的推文: The cliffs of Royal Gorge, Colorado are made of hard, ancient rocks like granite, and quartzite, carved steep by the Arkansas River over millions of years.
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https://t.co/UpQD07doSR
The cliffs of Royal Gorge, Colorado are made of hard, ancient rocks like granite, and quartzite, carved steep by the Arkansas River over millions of years.
📹itsmarcosparra
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