Mammoth
Hot Springs
Now let's take a tour of Yellowstone. Remember to go
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back to the map as your guide. The first stop on our
tour is Mammoth Hot Springs. Here you see flat, colorful rock
formations called terraces. Three key ingredients created the steplike terraces: water, heat, and minerals. Hot spring water contains
a mineral called calcium carbonate, which bubbles to the surface
in more than 50 hot springs at Mammoth. The calcium carbonate
settles on the ground when the water flows over the surface. Over
time, the calcium builds up, forming the terraces you see here.
Scenic
view
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