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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.

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.

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.

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.

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.

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