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Sedimentary Rocks

QuestionAnswer
Compaction Is the process in which sediment is squeezed and in which the size of the pore space between sediment grains is reduced by the weight and pressure of overlying layers.
Cememtation The process in which sediments are glued together by minerals that are deposited by water.
Chemical sedimentary rock Forms when the ions from dissolved minerals precipitate out of water because of changing concentrations of chemicals
Organic sedimentary rock Organic sedimentary rock is rock that forms from the remains of living things. Coal and some limestone's are examples of organic sedimentary rocks.
Clastic sedimentary rock Made of rock fragments that are carried away from their source by water, wind, or ice and left as deposits. Over time, the individual fragments may become compacted and cemented into solid rock
Sorting The tendency for currents of air or water to separate sediments according to size.
Angularity A rock that was created with sediments that have collided with other sediments. This will cause the rock to be very uneven.
Stratification Layering of sedimentary rock.
Cross-bedding Some sedimentary rocks are characterized by slanting layers.
Ripple marks Ripple marks are caused by the action of wind or water on sand. When the sand becomes sandstone, the ripple marks may be preserved
Mud Cracks Mud cracks form when muddy deposits dry and shrink. The shrinking causes the drying mud to crack. A river's flood plain or a dry lake bed is a common place to find mud cracks.
Concretions Sedimentary rocks sometimes contain lumps of rock that have a composition that is different from that of the main rock body.
Created by: evansloan19
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