Paleozoic Era

The Paleozoic Era is the earliest of three geologic eras of the Phanerozoic Eon. It spans from around 541 million years ago to 252 million years ago, and is divided into six periods: Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.

Key Events and Characteristics

• Diversification of Life: The Paleozoic era saw the rapid diversification of life forms, often referred to as the "Cambrian explosion."
• Early Vertebrates: The first vertebrates, including fish, began to appear during the Paleozoic era.
• Mass Extinctions: The end-Permian mass extinction, the largest extinction event in Earth's history, occurred at the end of the Paleozoic era, wiping out over 90% of marine species.
• Continental Drift: The Paleozoic era saw the formation and breakup of the supercontinent Pangaea, as well as the development of early forests and the colonization of land by plants and arthropods.

Study Guide

Here are some key points to focus on when studying the Paleozoic era:

1. Identify and understand the major geological events and periods within the Paleozoic era.
2. Examine the fossil record and understand the major evolutionary developments that occurred during this time.
3. Explore the environmental and climatic changes that took place, and their impact on the development of life on Earth.
4. Analyze the causes and consequences of the mass extinctions that mark the end of the Paleozoic era.
5. Consider the significance of the Paleozoic era in the context of Earth's geological and biological history.

By thoroughly understanding the Paleozoic era, you will gain valuable insight into the early evolution of life on Earth and the geological forces that shaped our planet during this time.

[Paleozoic] Related Worksheets and Study Guides:

• Geologic timeScience • Eighth Grade