* Erosion: The process of wearing away and transporting earth materials (like rocks, soil, and sand) by forces like wind, water, or ice.
* Deposition: The process where eroded materials settle down in a new location.
Types of Sediments:
* Clastic Sediments: Formed from fragments of pre-existing rocks, broken down by erosion. Examples include sand, silt, clay, and gravel.
* Chemical Sediments: Formed by precipitation from water solutions, often through chemical reactions. Examples include limestone, rock salt, and gypsum.
* Biogenic Sediments: Formed from the remains of living organisms. Examples include coal, oil shale, and some types of limestone.
Where Sediments Are Found:
* Rivers: Carry sediments downstream, depositing them in deltas, floodplains, and at the river mouth.
* Oceans: Receive sediments from rivers, wind, and marine organisms, forming layers on the ocean floor.
* Deserts: Strong winds erode and transport sand, creating sand dunes and other desert landforms.
* Glaciers: Carve and transport large amounts of rock and sediment, depositing them as moraines and outwash plains.
Sedimentary Rocks:
Over time, sediments can be buried, compacted, and cemented together to form sedimentary rocks. These rocks provide valuable information about Earth's history, climate, and past environments.
