The Silurian Period
The Silurian Period is a geological period that lasted from approximately 443 million years ago to 419 million years ago. It is part of the Paleozoic Era and is named after the ancient Celtic tribe of the Silures. This period is known for significant geological, climatic, and evolutionary events.
Geological and Climatic Events
During the Silurian Period, the Earth's continents were slowly coming together to form the supercontinent called Gondwana. This movement of tectonic plates led to the closing of the Iapetus Ocean and the formation of large mountain ranges. The climate during the Silurian was generally warm, and there were few polar ice caps.
Life during the Silurian
The Silurian Period is known for the diversification of marine life. Fish continued to evolve and diversify, with jawed fish becoming more prominent. The Silurian seas were inhabited by a variety of marine invertebrates, including corals, brachiopods, and trilobites. The first evidence of terrestrial life also appeared during this period, with early plants colonizing the land.
Study Guide
Key Concepts
- Geological events during the Silurian Period
- Climatic conditions and the absence of polar ice caps
- Diversification of marine life, including fish and invertebrates
- The emergence of early terrestrial life
Key Terms
Study Questions
- What geological events occurred during the Silurian Period?
- How did the climate differ during the Silurian compared to other periods?
- What are some examples of marine life that diversified during the Silurian?
- What was the significance of the emergence of early terrestrial life during this period?
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