Sedimentary Rocks

By Will Fricker

How sedimentary rocks form.

Sedimentary rocks form from the compaction and cementation of sediments.

Clastic Sedimentary rocks.

Clastic rocks are compacted sediments, and they are categorized by their size. An example of a clastic rock is Conglomerate.
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Chemical Sedimentary Rocks

Rocks made from chemical sediment. They are formed from chemicals dissolved in water. An example of this is salt.

Biochemical Sedimentary Rocks

Rocks that form from plant or animal remains, such as shells.
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Mechanical weathering

Mechanical weathering is the breakdown of rocks by water, wind, ice, and gravity. If water splashes against rocks enough, they will break down. If wind is always hitting a rock, it will whip sand on it, causing it to break down (or it could break it down on its own). When water freezes in a small crack and then freezes over night, it will expand, and it will widen the crack.

Chemical weathering

Chemical reactions break down the bonds holding the rocks together, causing them to fall apart, forming smaller and smaller pieces. The differrent types are Oxidation rusting, Carbonation, and hydrolysis.