What triggers 'supervolcanos'?
By: John Atchison
When one hears the term "supervolcanoes" there are a variety of mental pictures that might enter the brain. One could be straight out of the Sci-Fi channel, complete with a molten head and lava limbs. Maybe it's a scene from the 1997 classic movie, Volcano...
How coal is formed
By: Rex Trulove
Coal is used for heating and electricity generation. Understanding how it was originally created is a walk back into history that can be fun, interesting and enlightening. The logical place to start would be to know a bit about the conditions that started it.Swampy...
Understanding how limestone caves are made
By: Rex Trulove
Some of the largest and most stunningly beautiful caves in the world are limestone caves. They are found in many different countries and include many of the longest caves ever discovered. Some of these structures contain stalactites and stalagmites, limestone cascades and exceptionally delicate crystalline...
Scientists identify cause of Japan's 2011 devastating tsunami
By: Christine Zibas
A team of 27 scientists from 10 countries worked on the Japan Trench Fast Drilling Project (JFAST) to discover the nature of the geological phenomenon that led to the March 2011 tsunami in Japan that had devastating consequences for Japan and the world (particularly when...
A look at the history of eruptions from Italy's Mt. Etna
By: Christine Zibas
Although there hasn’t been a significant eruption from Italy’s Mount Etna since 1992, as recently as Nov. 23, 2013, nearby Stromboli in the Tyrrhenian Sea appeared to show signs of activity. It was the 17th sign of volcanic life in this part of...
What causes a volcano to erupt?
By: Rex Trulove
When examining the cause of a volcanic eruption, it is helpful to first look at the interior of the earth. At the very center of the Earth is a core of mostly iron and nickel, heated well over the melting point of either metal, but...
Understanding the three basic types of rock
By: Keith Redfern
Rocks vary in several ways. Some are soft and crumbly - others are immensely hard and resistant. Some allow water to pass through them - others are totally impermeable. Some have crystals - others don't, and some form layers or strata - others don't.In...
By: Janet Grischy
Pumice is whipped glass. Whipped in the sense that it incorporates bubbles that make it light enough to float on water, and glass in the sense that its chemical composition is the same as that of obsidian, volcanic glass. Pumice is thrown from erupting volcanoes...
Life near an active volcano
By: Author Name Withheld 161
Volcanoes have been around for millions of years. They are both incredibly destructive and beautifully life-forming. Volcanoes are openings on the surface of the Earth that allow hot liquids and gases to come forth from below. When the volcano erupts, it releases these liquids and...
By: Rex Trulove
Crater Lake was formed when Mount Mazama erupted thousands of years ago. As the massive magma pocket released its contents, throwing volcanic rock as far as Boise, Idaho and Canada, the action created an empty space above the magma pocket. No longer supported, the top...

 

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