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Clay-Sized Fraction

Definition

Particles below the system’s clay-size boundary, irrespective of mineral species. Particle-size categories depend on the stated classification and measurement method. Texture describes relative size composition rather than uniquely identifying a mineral or location.

Context
Soil description

For example, particles classified below a stated size boundary can belong to different mineral types despite all being called clay-sized.

Measurements obtained under different preparation or sizing methods may not be directly comparable.

Related terms

Munsell Notation
Munsell notation describes colour using hue, value and chroma within a defined system. A recorded observation should state relevant lighting, specimen condition...
Soil Horizon
A soil horizon is a layer distinguished by relevant properties within a soil profile under a stated classification. Natural development, disturbance, transport...
Texture
Relative particle-size composition using a stated classification and measurement basis. Texture describes relative size composition rather than uniquely identifying a mineral or...

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