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The Sandstone Top of the Canyon

This is not the easiest thing to do—especially in a 100 degree heat—but it’s worth it.
The Grand Canyon's Oldest Rocks

“This rock is more than 4000 feet below the rim of the canyon."
From Lava to Land

So how did North America and its fellow continents get started?
A Massive Volcanic Eruption

This rock is what remains from one of the biggest volcanic eruptions ever.
Fossil-Filled Limestone

340 million years ago, a warm shallow sea covered all of the American Southwest.
Five Steps of Volcanic Rock

These falls are the record of a series of volcanic eruptions that happened in this area.
Semi-Precious Pebbles

Where you find agates, volcanoes—the source of the gas bubbles—are usually not far way.
Tearing North America Apart

A map of the Midwest of the United States shows the distribution of basalt flows.
Fossilized Sand Dunes

This is Zion Canyon. Its 2000-foot sandstone cliffs are among the tallest of their kind.
Exuma Cays 3

This video explores Exuma Cays.

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