Devonian Period

The Devonian Period was a geological period that spanned from approximately 419.2 million years ago to 358.9 million years ago. It is often referred to as the "Age of Fishes," as this period saw significant diversification and evolution of fish species. The Devonian Period is also known for the first appearance of tetrapods, which were the first vertebrates to transition from water to land.

Geological Events

During the Devonian Period, the supercontinent of Gondwana began to drift towards the South Pole, leading to the formation of the southern continents. This movement of landmasses significantly impacted global climate and ocean currents.

Life Forms

The Devonian Period witnessed the diversification of marine life, with the appearance of numerous new species of fish, including the first jawed fish. Additionally, the first forests began to emerge during this period, leading to the evolution of early terrestrial plant life. The presence of shallow seas and swamps provided the perfect environment for the proliferation of plant and animal species.

Study Guide

Key Concepts

• Geological events and continental drift during the Devonian Period
• Evolution and diversification of fish species
• Transition of vertebrates from water to land
• Emergence of early terrestrial plant life

Key Terms

Make sure to familiarize yourself with the following key terms:

• Tetrapods
• Gondwana
• Jawed fish
• Shallow seas and swamps

Study Tips

When studying the Devonian Period, it is important to focus on understanding the interconnectedness of geological events, climate changes, and the evolution of life forms. Use visual aids such as geological maps and evolutionary timelines to better comprehend the changes that occurred during this period.