Pangaea: The Supercontinent

Pangaea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, about 335 to 175 million years ago. The concept of Pangaea was proposed by Alfred Wegener, a German meteorologist and geophysicist, in the early 20th century. The word "Pangaea" is derived from the Greek words "pan", meaning "all", and "gaea", meaning "earth".

Formation of Pangaea

According to the theory of plate tectonics, the Earth's lithosphere is divided into several large and small plates that float on the semi-fluid asthenosphere. These plates are in constant motion, driven by processes such as seafloor spreading, subduction, and mantle convection. About 335 million years ago, all the major landmasses on Earth were joined together to form the supercontinent Pangaea.

Breakup of Pangaea

Over millions of years, the forces of plate tectonics caused Pangaea to break apart. This process resulted in the formation of the continents as we know them today. The breakup of Pangaea led to the opening of the Atlantic Ocean and the formation of the current continental configurations.

Evidence of Pangaea

There are several lines of evidence that support the existence of Pangaea. Fossil evidence, such as similar plant and animal species found on continents that are now widely separated, suggests that these landmasses were once connected. Additionally, geological evidence, including matching rock formations and mountain ranges across different continents, provides further support for the theory of Pangaea.

Study Guide

1. What was Pangaea?
2. Who proposed the concept of Pangaea?
3. How did the formation of Pangaea occur?
4. What led to the breakup of Pangaea?
5. What are some pieces of evidence that support the theory of Pangaea?

Understanding the concept of Pangaea is crucial for comprehending the history of Earth's continents and the processes that have shaped the planet over millions of years.

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