the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans.
rock
a solid inorganic substance of natural occurrence.
mineral
the stratification or layering of rocks or other geological materials.
bedding
hot fluid or semifluid material below or within the earth's crust
magma
hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
lava
igneous rocks that form from crystallized magma beneath the earth's surface
intrusive
igneous rocks formed on the surface
extrusive
occurs when only a portion of a solid is melted
partialmelting
formed through the cooling and solidification of magma or lava
igneousrock
Veins of extremely large-grained minerals
pegmatites
large, well-formed crystals surrounded by fine-grained crystals of the same or different minerals
Porphyritic
size, shape, and distribution of crystals or grains that make up a rock 
texture
when mineral growth cements sediment grains together into rock
Cementation
chemical sedimentary rocks that form as a result of crystal grains precipitating out of a supersaturated body of water
evaporite
a subsurface area of rock that has enough porosity to allow for the accumulation of oil, natural gas, or water
Reservoir
the percentage of open spaces between grains in a rock
Porosity
sediments having particles ranging in size from boulders to microscopic particles, which often have worn surfaces and rounded corners.
Clastic
a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.
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