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Introduction to Sediments

Learn about Udden-Wentworth scale for sediment classification by grain size and significance of porosity in controlling fluid movement in rocks and sediments. Discover the relationship between particle size, shape, and composition in sedimentary sampling techniques.

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Introduction to Sediments

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  1. Introduction to Sediments Aquatic Ecology

  2. Udden-Wentworth scale. Sediments can be classified by grain size according to the Udden-Wentworth scale. Larger grains tend to remain near their source, whereas smaller particles can be more easily transported over long distances, even by slow-moving currents of water or wind.

  3. Soils

  4. USDA

  5. Classification of Sediments • Porosity • Particle Size • Shape/Composition

  6. Porosity • Porosity and permeability are two of the primary factors that control the movement and storage of fluids in rocks and sediments. • Porosity is the ratio of the volume of openings (voids) to the total volume of material. • Porosity represents the storage capacity of the geologic material. • The primary porosity of a sediment or rock consists of the spaces between the grains that make up that material. • The more tightly packed the grains are, the lower the porosity.

  7. Particle Size

  8. Shape/Composition • Sedimentary

  9. Sampling • Seives • Seive Shaker/Rototap

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