Teaching Students About the End-Triassic Extinction


The End-Triassic Extinction is an important topic to cover when teaching students about Earth’s history and the development of life. This mass extinction event, which occurred approximately 201 million years ago, led to the demise of many marine species and opened up new ecological niches for other organisms to occupy. In this article, we will discuss various methods for effectively teaching students about the End-Triassic Extinction.

Start with the basics

Begin your lesson by providing a brief explanation of what mass extinctions are, and how they have shaped Earth’s history. Introduce students to the concept of geological time periods, focusing on the boundary between the Triassic and Jurassic periods.

Explain the causes

The primary reason for the mass extinction at the end of the Triassic was widespread volcanic activity. Explain how this volcanic activity released large amounts of carbon dioxide and other greenhouse gases into the atmosphere, leading to global warming and acidification of the oceans. Emphasize that volcanic activity was not the only factor, but that it likely played a major role in triggering this event.

Discuss affected species

Provide examples of species that went extinct at the end of the Triassic period, such as ammonoids, conodonts, and several families of reptiles. Explain that while some groups became entirely extinct, others experienced severe declines in diversity; for example, ammonoids survived but with significantly diminished numbers.

Highlight ecological consequences

Discuss how this mass extinction allowed for new species to evolve and fill vacant ecological niches—particularly dinosaurs which would come to dominate terrestrial ecosystems during the Jurassic period. Demonstrate how these new creatures helped shape Earth’s ecosystems as we know them today.

Make connections to modern times

Connect the events leading up to and following the End-Triassic Extinction to modern-day issues such as climate change and ocean acidification. Encourage students to consider how our current actions may be influencing future extinctions and Earth’s biodiversity.

Utilize multimedia resources

Incorporate various multimedia resources into your lesson, such as videos, interactive maps, and online simulations, to help students visualize the scale of this mass extinction and its impacts on Earth’s ecosystems.

Hands-on activities

Implement hands-on activities like reconstructing fossils or creating a timeline of Earth’s mass extinctions to engage students and encourage critical thinking skills. This can enhance their understanding of the End-Triassic Extinction as well as the broader topic of Earth’s history.


By exploring the causes, consequences, and significance of the End-Triassic Extinction, you can help students develop a deeper understanding of Earth’s history and the fragility of life. By making connections to present-day issues, you equip them with the knowledge needed to make informed decisions about our planet’s future.

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