Term
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Definition
any rock formed by the cooling and hardening of
hot liquid rock |
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Term
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Definition
| hot liquid rock beneath the earth’s surface |
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Term
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Definition
| magma that reaches the earth’s surface |
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Term
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Definition
| igneous rock that forms deep within the earth |
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Term
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Definition
igneous rock that forms from lava at the earth’s
surface |
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Term
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Definition
igneous rock that has very small or no
visible crystals and indicates that the rock cooled very
fast |
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Term
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Definition
igneous rock that has large crystal
faces, which indicates that the rock cooled very slowly |
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Term
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Definition
| what the rock is made from |
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Term
| light colored or granitic |
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Definition
indicates the rock contains
minerals like quartz and feldspars which are high in silica and low in iron |
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Term
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Definition
indicates that the rock contains
minerals such as olivine and pyroxene which are high in iron, calcium or magnesium |
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Term
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Definition
igneous rock that has changed and thus
has two or more different sized mineral crystals |
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Term
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Definition
irregular formation of intrusive rock formed by magma beneath the surface of the earth as it slips into the
cracks and crevices of other rock |
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Term
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Definition
huge, irregularly shaped intrusion that extends deep
into the earth’s crust. Generally has an exposed area larger that 100 square km |
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Term
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Definition
| domelike intrusion that pushes the overlying rocks(the rocks above it) into an arch and has a flat floor |
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Term
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Definition
sheetlike mass of igneous rock that lays horizontally
between rock layers |
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Term
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Definition
narrow, flat formation of igneous rock formed in the
vertical cracks in the existing rocks |
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Term
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Definition
layers of lava that build up on a flat area on the Earth’s surface. These are directly related to lava flows
and fissures |
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Term
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Definition
large cracks in the Earth’s surface where lava can ooze
out onto the ground |
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Term
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Definition
| any flow of lava on the surface of the Earth due to fissures or volcanoes |
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Term
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Definition
formed when magma hardens inside of the vent of
a volcano. The rock that makes up the “neck” is harder than
the surrounding volcanic cone material. Over time, the cone material is eroded away leaving only the “neck” remaining. |
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