Chapter 24 - The History of Life on Earth - 24.2 - Changes in Earth's Physical Environment Have Affected the Evolution of Life - 24.2 Recap - Learning Outcomes - Page 518: 1

Severe volcanic eruptions have been known to release a massive amount of ash, particulate matter and sulfurous acid into the air, effectively blanketing the earth in a layer that prevents sunlight from penetrating. Tectonic processes and meteor strikes have had similar effects, and in drastic cases have lead to the prolonged cooling of the earth and the extinction of many surface-dwelling organisms.

Severe volcanic eruptions have been known to release a massive amount of ash, particulate matter and sulfurous acid into the air, effectively blanketing the earth in a layer that prevents sunlight from penetrating. Tectonic processes and meteor strikes have had similar effects, and in drastic cases have lead to the prolonged cooling of the earth and the extinction of many surface-dwelling organisms.