The Grand Canyon is one of the most amazing sights on Earth--a gorge 277 miles (446 km) long; a wonderland of soaring cliffs made of rocks that are stained many colors. Scientists are learning a great deal about how old planet Earth is based on the layers of rock found in the Grand Canyon.
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The Grand Canyon is one of the most amazing sights on Earth--a gorge 277 miles (446 km) long; a wonderland of soaring cliffs made of rocks that are stained many colors. Scientists are learning a great deal about how old planet Earth is based on the layers of rock found in the Grand Canyon.
Read Less
