| Question |
Answer |
| basaltic | the dark, dense igneous rock of a lava flow or minor intrusion, composed essentially of labradorite and pyroxene and often displaying a columnar structure. |
| lava | Molten rock that reaches the earth's surface through a volcano or fissure.
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| cementation | A process which consists in surrounding a solid body with the powder of other substances, and heating the whole to a degree not sufficient to cause fusion, the physical properties of the body being changed by chemical combination with powder; thus iron be |
| compaction | The process by which the porosity of a given form of sediment is decreased as a result of its mineral grains being squeezed together by the weight of overlying sediment or by mechanical means.
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| nonfolliated | form of metamorphic rock that is not aligned in parallel lines |
| extrusive | Derived from magma poured out or ejected at the earth's surface. Used of igneous rocks.
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| rock | mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable quantities in nature, as by the action of heat or water. |
| foliated | Of or relating to rock that exhibits a layered structure.
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| rock cycle | the process by which rocks are formed, altered, destroyed, and reformed by geological processes and which is recurrent, returning to a starting point |
| granitic | a coarse-grained igneous rock composed chiefly of orthoclase and albite feldspars and of quartz, usually with lesser amounts of one or more other minerals, as mica, hornblende, or augite |
| sediment | Solid fragments of inorganic or organic material that come from the weathering of rock and are carried and deposited by wind, water, or ice.
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| igneous rock | rock formed by the solidification of molten magma |
| sedimentary rock | rock formed from consolidated clay sediments |
| intrusive | of rock material; forced while molten into cracks between layers of other rock |
| metamorphic rock | rock altered by pressure and heat |
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