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6
|
a large steep volcano built up of alternating layers of lava and ash or cinders
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7
|
generates on convergent plates where the oceanic lithosphere is subducting
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9
|
a long narrow, cross-cutting mass of igneous rock intruded into a fissure in older rock
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11
|
broad domed volcano with gently sloping sides characteristic of the eruption of fluid basaltic rock
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12
|
a dense, destructive mass of very hot ash, lava fragments and gasses ejected explosively from a volcano and typically flowing downslope at a great speed
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15
|
a reservoir of magma in the earths crust where magma may reside temporarily on its way from the upper mantle to the earths surface
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16
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a dark, fine-grained igneous rock consisting mostly of plagioclase flaspar and pyroxeny and sometimes olvine
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19
|
convergent plate boundary where the oceanic lithosphere is subducting
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20
|
a column of solidfied lava of igneous rock formed in a volcanic vent especially exposed by erosion
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1
|
a vent in the earths crust through which lava, stream, ashes, etc. are expelled, either continuously or at irregular intervals
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2
|
an area hotter than the surrounding surface, as on a shell of a furnace.
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3
|
a large body of intrusive igneous rock believed to have crystallized at a considerable depth below the earths surface
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4
|
a cauldron- like volcanic feature usually formed by the collapse of land following a volcanic eruption
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5
|
an aispersion in air of molecules of water especially as produced by evaporation at ambient temperature than by boiling.
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6
|
a steep, conial hill consisting of glassy volcanic vents
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8
|
clastic volcanic material, as scoria, dust, etc.. ejected during an eruption
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10
|
the form of silicon, occuring especially as quartz sand, flint and agate: used usually in the form of its prepared white powder
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13
|
a tabular body of intrusive igneous rock ordinarily between beads of sedimentary rocks of layers of volcanic ejecta
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14
|
the molten fluid rock that issue from a volcano or volcanic rock
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17
|
powdery residue left after the burning of a substance
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18
|
a bowl shaped depression with a raised rim
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20
|
open at earths surface from which volcanic material is emitted
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