Tectonics

What Are Tectonics?

Tectonics is the study of how Earth's crust changes shape over time. The word comes from an ancient Greek word meaning "pertaining to building." It helps us learn how our planet works.

Moving Plates

Tectonics helps explain why mountains are built and why some places have earthquakes or volcanoes. Scientists study tectonics to find valuable resources like fossil fuels and metal ores. Understanding these processes helps us learn about many features on Earth's surface.

How Earth Moves

The lithosphere, which includes the crust and the top part of the mantle, breaks into pieces called plates. These plates move over a softer layer below, called the asthenosphere. There are three main ways these plates interact: they can move apart, slide past each other, or come together. When plates move apart, new land forms. When they slide past each other or push together, this movement can cause big earthquakes and many of the world's volcanoes, like those around the Pacific Ring of Fire.

Studying Tectonics

Scientists study different kinds of tectonics, such as salt tectonics, which looks at how thick layers of rock salt change the shape of rocks around them. Neotectonics studies how Earth's crust moves and changes today and in the recent past. Tectonophysics examines the physical processes that cause Earth's crust and mantle to change shape. Seismotectonics explores the link between earthquakes and the movement of Earth's crust.