Support Provided By
1:10
These are the North Dakota Badlands
thousands of square miles of arid gullies and buttes.
2:16
It would take dramatic transformations to turn volcanic islands into the first continents.
1:18
This place is a paradise for geologists and one of our national treasures. It is, of cour
0:26
These falls are the record of a series of volcanic eruptions that happened in this area.
1:01
A map of the Midwest of the United States shows the distribution of basalt flows.
1:15
This is Zion Canyon. Its 2000-foot sandstone cliffs are among the tallest of their kind.
2:00
But why is it that these layers that were once horizontal are now standing on their heads?
0:52
It's actually the geology that gives this very American city its very particular look.
