Category PHYSICAL GEOLOGY

What is Physical Geology?

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Physical geology is one of the oldest and most foundational branches of Earth science. It is the scientific study of Earth’s materials, the processes that shape its surface and interior, and the forces that have driven planetary change across billions…

The Structure of the Earth

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Few subjects in Earth science are as fundamental—or as fascinating—as the internal structure of our planet. Beneath the surface where we live, work, and build civilizations lies a complex, layered system of rock, metal, and superheated material that has been…

How Do Geologists Study the Earth?

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Geology is one of the oldest sciences, yet its methods continue to evolve at a remarkable pace. From hammering rocks in remote mountain ranges to analyzing seismic data on high-performance computers, geologists have developed a sophisticated toolkit for decoding the…

The Rock Cycle

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The Earth beneath your feet is far from static. Every mountain range, ocean floor, and desert plain is part of a slow, continuous process of geological change—one that has been reshaping the planet’s surface for over four billion years. This…

Igneous, Sedimentary, and Metamorphic Rocks

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Rocks are far more than static objects underfoot. They are dynamic archives of Earth’s history, recording billions of years of geological activity across every continent and ocean floor. The three major rock types—igneous, sedimentary, and metamorphic—form through entirely different processes,…

How Minerals Are Identified

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Minerals form the foundation of the Earth’s crust and play a central role in geology, industry, and everyday life. From the glittering facets of a diamond to the metallic sheen of pyrite, each mineral possesses a distinct set of physical…

Common Minerals Found in Earth’s Crust

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The ground beneath your feet is far more complex than it appears. Earth’s crust—the thin, outermost layer of our planet—is composed of an extraordinary variety of minerals, each with its own chemical structure, physical properties, and role in shaping the…

What Are Plate Tectonics?

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Beneath every mountain range, ocean trench, and volcanic island lies a story millions of years in the making. Plate tectonics is the scientific theory that explains how Earth’s outermost layer is divided into massive, interlocking pieces—and how the slow, relentless…

How Earthquakes Occur

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Earthquakes rank among the most powerful and unpredictable natural phenomena on Earth. In seconds, they can reshape landscapes, trigger tsunamis, and cause widespread destruction across entire regions. Yet despite their sudden and violent nature, earthquakes follow well-understood geological principles—principles that…