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Stack #106240

definitionterm
an area of the Earth's surface through which magma and volcanic gases pass= volcano
an eruption that occurs with great force releasing gases, ash and hardened pieces of lava also known as pyroclastic material= explosive eruption
eruption of flowing lava= nonexplosive eruption
cool stiff lava that does not travel far from the erupting vent; cools into sharp-edged chunks= blocky lava
very rough hardened lava; very jagged edges= Aa
smooth surface hardened lava due to slow eruption rate= pahoehoe
lava that forms from underwater eruptions; rounded lumps that resemble pillows= pillow lava
molten rock that is inside the Earth= magma
occur in an explosive eruption; volcanic blocks, volcanic bombs, lapilli and volcanic ash pyroclastic materal
an area of continuous volcanic activity; Hawaii and Iceland are examples of hotspots hotspot
the area around the central vent of a volcano crater
solid pieces of hardened magma larger than 64 millimeters in diameter; released during an explosive eruption volcanic blocks
large pieces of magma that harden in the air as they erupt from a volcano volcanic bombs
formed from gases expanding rapidly in magma; the walls of the gas bubbles explode into glasslike slivers; makes up most of the pyroclastic explosive eruption volcanic ash
"little stones"; tiny pieces of magma that harden before they hit the ground lapilli
a volcano with steep slopes, usually small, often occur in clusters, erode very quickly because material is not cemented together, produced by a moderate explosive eruption cinder cone
formed by alternating explosive (pyroclastic material) and nonexplosive eruptions (lava);most common; broad bases with steep slopes composite volcano
formed from layers of lava from nonexplosive eruptions; lava spreads over wide area; gently sloping sides shield volcano
Created by: prewitt6
Popular Earth Science sets

 

 



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