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[[Image:Lava.jpg|thumb|300px|Lava moves across the ground as a [[pahoehoe]] flow, Kilauea Volcano, Hawai`i]]'''Lava''' is the term for [[magma]] from the [[Earth|Earth's]] [[mantle]] when it erupts onto the Earth's surface. Geologists also use the word to describe the solidified deposits of lava flows and fragments hurled into the air by explosive eruptions (for example, lava bombs or blocks).  Lavas differ in chemical composition, but most forms of lava average 3000-4000 degrees [[Fahrenheit]].  Lavas are classified into the following categories based on their chemical composition: [[Basalt]] ([[Hawaii|Hawaiian]] [[volcano|volcanoes]]), [[Andesite]] ([[Andes Mountains]]), [[Dacite]] ([[Mt. St. Helens]]), or [[Rhyolite]] ([[Yellowstone National Park|Yellowstone]] [[Caldera]]).

[[Image:Lava.jpg|thumb|300px|Lava moves across the ground as a [[pahoehoe]] flow, Kilauea Volcano, Hawai`i]]  

'''Lava''' is the term for [[magma]] from the [[Earth]]'s [[mantle]] when it erupts onto the Earth's surface. [[Geologists]] also use the word to describe the solidified deposits of lava flows and fragments hurled into the air by explosive eruptions (for example, [[lava bombs]] or blocks).  Lavas differ in chemical composition, but most forms of lava average 3000-4000 degrees [[Fahrenheit]].  Lavas are classified into the following categories based on their chemical composition: [[Basalt]] ([[Hawaii]]an [[volcano|volcanoes]]), [[Andesite]] ([[Andes]] Mountains), [[Dacite]] ([[Mt. St. Helens]]), or [[Rhyolite]] ([[Yellowstone National Park|Yellowstone]] [[caldera]]).

[[category:geology]]

[[category:Igneous rocks]]