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Plinian eruption - Wikipedia, the free encyclopedia (234 words) |
 | Plinian eruptions are marked by columns of smoke and ash extending high into the stratosphere. |
| The examples of large Plinian eruptions resulting in formation of a caldera are the 1883 Krakatoa eruption, the 1980 eruption of Mount St. Helens, the 1500 BC Santorini eruption, and the 4860 BC eruption that formed the Crater Lake, and of course Vesuvius in 79 A.D, which was the prototypical Plinian Eruption. |
| The lava is usually rich on silicates; basaltic lavas are atypical for Plinian eruptions, the example is the 1886 eruption of Mount Tarawera. |
| USGS Photo Glossary: Plinian eruption (221 words) |
| Plinian eruptions are large explosive events that form enormous dark columns of tephra and gas high into the stratosphere (>11 km). |
| Large plinian eruptions sometimes result in the withdrawal of so much magma from below a volcano that part of it collapses to form a large depression called a caldera. |
| Some plinian eruptions inject such large quantities of aerosols (small liquid droplets) into the stratosphere that surface temperatures on earth may decrease slightly. |
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