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Volcano Info |
Volcano Dictionary |
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Types of Volcanoes | The Ring of Fire | ||
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'a'a 'A'a (pronounced "ah-ah") is a Hawaiian term for a lava flow that has a rough, broken-up, spiny surface. It is composed of broken lava blocks called clinkers. The interior of 'a'a is very dense. |
accretion Accretion is the accumulation of sediment (mud, sand, etc.) by deposition, often occurring along a shoreline or in a river delta. |
acid rain Acid rain is polluted and harmful to the environment. |
airfall Airfall (also called ashfall) is volcanic ash that falls from an ash cloud or a volcanic column. |
andesite Andesite is a type of volcanic rock. This gray to black rock is composed of about 54 to 62 percent silica (SiO2), plus some iron and magnesium. |
ash cloud An ash cloud (also called an eruption cloud) is the cloud of ash that forms after some volcanic eruptions. |
ashfall Ashfall (also called airhfall) is volcanic ash that falls from an ashcloud or a volcanic column. |
ash, volcanic Volcanic ash is a harsh abrasive type of ash (unlike ash from a wood fire) that is made up of small rock, mineral, and volcanic glass fragments (these fragments are less than 0.1 inch (2 mm) in diameter). |
asthenosphere The asthenosphere (also spelled aesthenosphere) is a part of the Earth's upper mantle that exhibits plastic properties. It is located below the lithosphere (the crust and upper mantle), between about 100 and 250 kilometers deep. |
atmospheric shock wave An atmospheric shock wave is compressed air that is formed by a volcanic eruption. |
atom Everything is made up of tiny atoms. An atom is the smallest part of an element that has the properties of that element. |
avalanche An avalanche is a a large mass of falling and/or sliding material. Avalanches can be composed of rock, snow, soil, or ice. Volcanic eruptions can cause avalanches. |
Volcano Info |
Volcano |
Volcano Activities and Printouts |
|
Types of Volcanoes | The Ring of Fire | ||
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
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