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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

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the process of eroding or being eroded by wind, water, or other natural agents.

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the binding together of particles or other things by cement.

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any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc.

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an idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.

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The root word also lends itself to other geologic terms. The sub-discipline of geology that involves study of rock strata is called stratigraphy. Layering of rocks or sediment is also called stratification. A sequence of sedimentary layers stacked one atop the other is known as a stratigraphic section.

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Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.

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Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water (rivers, lakes, and oceans), ice ( glaciers ), and wind. Sedimentary rocks are often deposited in layers, and frequently contain fossils. Note : Limestone and shale are common sedimentary rocks.

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metamorphic rock definition. Rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase. Note : Examples are marble, which can be formed from limestone, and slate, which is formed from shale.