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Chapter 7 - Landforms, Rocks, and Minerals

earth_science

Unit C - Earth and Its Resources

Chapter 7 - Landforms, Rocks, and Minerals

Discover more about the Earth's crust, rocks, and soil. Learn how volcanoes and earthquakes continuously change the surface of our dynamic planet.

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Article

Zircon Chronology: Dating the Oldest Material on Earth

The mineral zircon serves as a tiny time capsule, recording geologic events—it's especially useful because the oldest discovered grains (4.2 billion to 4.3 billion years old) are not much younger than the Earth itself.

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Young Naturalist Awards Essay

Reading the Rocks in Cold Spring Harbor, New York

After 200 years and the mining of 106 million tons of iron, the Cornwall iron mine was closed. Yet, as this 10th-grader from Pennsylvania argues, the site's geologic importance is far from over.

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