1. Sand: These are small, loose particles of rock and mineral fragments. They are typically created by weathering and erosion of larger rocks.

2. Clay: These are very fine-grained particles of sediment, often made up of minerals like clay minerals and mica. They are typically formed from the breakdown of weathered rocks and minerals.

3. Silt: These particles are smaller than sand but larger than clay. Silt is often found in riverbeds and deltas.

4. Gravel: These are larger, loose fragments of rock and mineral fragments, often larger than 2 millimeters in diameter. They are typically formed from the weathering and erosion of existing rocks.

Let me know if you'd like more information about any of these sediment types!