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Unformatted text preview: resistant at its center than its sides. Extrusive Igneous Landforms 1. Composite Volcano: A cone shaped feature formed by alternating layers of lava and ash. Sometimes, a volcano erupts so violently, its crater is blown off enlarging the top depression. This is then known as a caldera . If filled with water, it is known as a Caldera Lake. 2. Lava Plateau: This is an upland with a generally level summit made up off successive layers of lava and ash. Types of Volcanoes 1. Active: This is a volcano that has erupted within the last 500 years and still shows signs of activity. 2. Dormant: This is a volcano that has not erupted within the last 500 years but still shows signs of activity such as hot springs. An example is Mt. Kilimanjaro. 3. Extinct: This is a volcano that has not erupted within the last 500 years and shows no signs of activity. An example is Mt. Kenya....
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- Fall '09