Sediments Rocks:Sedimentary rock is one of the three main rock groups along with igneous and metamorphic rocks and is formed in four main ways.
Magma: hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling.
Sedimentary Rocks: by the deposition of the weathered remains of other rocks known as clastic sedimentary rocks.
Ingneous Rock: Igneous rocks can form beneath the Earth's surface, or at its surface, as lava.
Metamorphic Rocks: denoting rock that has undergone transformation by heat, pressure, or other natural agencies e.g. in the folding of strata or the nearby intrusion of igneous rocks.
Melting/cooling Rocks: Melting a rock requires extremely high temperatures, which only occur far beneath the earth's surface.
compaction and cementation: the sedimentary sequence has changed into a sedimentary rock.
heat/pressure: heat and pressure from burial or contact with intrusive or extrusive igneous rocks. Meta means change,and morph means form.
weathering/erosion: Once the rock has been weakened and broken up by weathering it is ready for erosion. Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity.