Silurian Period

The Silurian Period is a geologic period that occurred from approximately 443 million years ago to 419 million years ago. It is named after the Silures, a Celtic tribe in Wales, where rocks from this period were first studied.

Geology and Climate

During the Silurian Period, the Earth was experiencing significant changes. The period began with a warm climate, and by the end of the period, the Earth had entered a cooling phase. This period is also known for the formation of large reefs, such as the famous Great Barrier Reef in Australia.

Life Forms

The Silurian Period saw the evolution and diversification of many new life forms, especially in the oceans. Some of the key developments include the appearance of the first jawed fish and the rise of early plants on land. The period also saw the first appearance of terrestrial arthropods, such as scorpions and millipedes.

Study Guide

1. What is the Silurian Period named after?
2. Describe the climate during the Silurian Period.
3. What significant geological formations are associated with the Silurian Period?
4. What were some key developments in life forms during the Silurian Period?
5. What were some of the first creatures to appear on land during this period?

[Silurian] Related Worksheets and Study Guides:

• Geologic timeScience • Eighth Grade