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Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon ... of the canyon, including its many colors and rock formations.

Marble Canyon ... of the Grand Canyon, the stillness allows the subtlest natural sounds to emerge, from the call of a peregrine falcon overhead to the scamper of a scorpion underfoot. Rock ...

The canyon is, well, grand — a mile-deep crack in the planet’s crust, its oldest and deepest layers forged in the Earth’s furnace before multicellular ... I felt a bubble of nervousness in my stomach ...

Our family just returned from our first visit to the Grand Canyon and let me tell ... colors shift with the light, the layers of history etched into the rock, the kind of silence that feels ...