There are six muscles that are present in the orbit (eye socket) that attach to the eye to move it. These muscles work to move the eye up, down, side to side, and rotate the eye. The superior rectus is an extraocular muscle that attaches to the top of the eye.
Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel. When this loose alluvial material is deposited or cemented into a lithological unit, or lithified, it is called an alluvial deposit.ost, if not all, alluvium is very young (Quaternary in age), and is often referred to as cover because these sediments obscure the underlying bedrock. Most sedimentary material that fills a basin (basin fill) that is not lithified is typically lumped together as alluvial.
â¢ A delta is a fan-shaped deposit of sediment that forms where a river meets a large body of water. â¢ Alluvial fans can form when a river deposits sediment on land. â¢ Flooding brings rich soil to farmland and may cause a stream to change course. â¢ Flooding can also lead to property damage and death.fter rivers erode rock and soil, they drop, or deposit, their load downstream. Deposition is the process in which material is laid down or dropped. Rock and soil that are deposited by streams are called sediment. Rivers and streams deposit sediment where the speed of the water decreases.