Volcano - Calderas, Magma, Eruptions

volcano

Table of Contents

References & Edit History Related Topics

Images & Videos

How volcanoes work, explained by a volcanologist

What it's like to visit an active volcano

Classify volcanic eruptions according to the physical and chemical properties of their magma

For Students

volcano summary

Read Next

Mount Saint Helens (Cascade Range, southwestern Washington) spewing ash during the 1980 eruption.; Mount St. Helens

35th Anniversary of Mount Saint Helens Eruption

Arenal Volcano in northwestern Costa Rica in the province of Alajuela.

Are Volcanoes Dangerous When They’re Not Erupting?

Ash cloud rising from the Kilauea Volcano Pu`u `O `o as crater floor collapses due to magma withdrawal. Incandescent rubble can be seen crumbling and rolling down the scarp. East rim of Pu`u `O `o is in the foreground, Kilauea, Hawaii on March 6, 2011.

Watch Your Step: 6 Things You Can Fall Into

animated gif/infographic of the Mount Tambora eruption, April 1815. volcano. Indonesia.

How the 1815 Eruption of Mount Tambora Produced the “Year Without a Summer”

Mount Tambora 200 Years Later

Discover

Solar Eclipse, Eclipse, Solar Flare, Outer Space, Astronomy

What Causes Lunar and Solar Eclipses?

The Sun Was Eaten: 6 Ways Cultures Have Explained Eclipses

VAN, TURKEY - OCTOBER 25: A building and car ruined during the earthquake of Van-Ercis on October 25, 2011 in Van, Turkey. It is 604 killed and 4152 injured in Van-Ercis Earthquake.

What Is an Aftershock?

Albert Einstein in Washington, D.C. c. 1921-1923. Physicist

The Solar Eclipse That Made Albert Einstein a Science Celebrity

Artist interpretation of a Space meteoroid impact. Meteor impact. Asteroid, End of the world, danger, destruction, dinosaur extinct, Judgement Day, Planet Earth, Doomsday Predictions, comet

10 Failed Doomsday Predictions

Julius Caesar in full Gaius Julius Caesar (100? BCE-44 BCE) statue in Rimini, Italy. Roman general and statesman and dictator

The Time Julius Caesar Was Captured by Pirates

earthquake. Heavily damaged school in the town of Yingxiu after a major earthquake struck China's Sichuan Province on May 12, 2008.

The 6 Deadliest Earthquakes Since 1950

Most calderas—large circular or oval depressions more than 1 km (0.6 mile) in diameter—have been formed by inward collapse of landforms after large amounts of magma have been expelled from underground. Many are surrounded by steep cliffs, and some are filled with lakes. The terms crater and caldera are often used synonymously, but calderas are larger than craters. A crater can occur inside a caldera, as at Taal Lake in the Philippines, but not the reverse. Calderas are often associated with large eruptions (those producing volumes of 10 cubic km [2.4 cubic miles] or more) of dacitic or rhyolitic magma ...(100 of 12070 words)

Access the full article

Help support true facts by becoming a member.