The Rocky Mountains are described as younger because the Rocky's are really two mountain chains. The older mountain chain started billions of years ago, and the younger mountain chain pushed the older mountain chain up more, only 60 millions years ago.
Answer: contour lines .
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Explanation:
Mine would be a magical fantasy-type planet. :) People would have magical powers and the nature would be beautiful. The creatures would be all fictional: faries, trolls, mermaids, dragons, ectera. :D #PlanetTime
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-60 degrees Fahrenheit year-round
