Earth Science vocab 2
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material with composition of SiO2
a broad, gently sloping volcanic cone of flat-dome shape, usually seceral tens or hundreds of square miles in extent
Composite cone (stratovolcano)
a volcano that is constructed of alternating layers of lava and pyroclastic deposits
a large basin shaped volcanic depression, more or less circulr, the diameter of which is many times greater that of the included vent or vents.
a wet mixture of water, mud, and volcanic rock fragments, with the consistency of wet concrete, that flows down the slopes of a volcano and its river valleys.
the property of a fluid to offer internal resistance to flow
a high density mixture of hot ash and rock fragments with hot gases formed by a volcanic explosion or aerial expulsion from volcanic vent
a blob of lava that was ejected while viscous and recieved a rounded shap while in flight.
pyroclastic in the generals size range of 2 to 64 mm.
fine pyroclastics in the general size range of 2 to 64mm
volcanic explosivity index
the percentage of pyroclastics among the total products of a volcanic eruption
Intrusive igneous rock
igneous rock formed at considerable depth by the crystallization of magma
Extrusive igneous rock
an igneous rock that has formed by eruption of lava onto the surface of the earth
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