Jackson-Sherman weathering stages
mineralogy
Quick Summary
The Jackson-Sherman weathering stages categorize soil development based on the mineralogy of the clay fraction, reflecting increasing time and weathering intensity.1
- Early Stage: Characterized by minerals like gypsum and carbonates. These soils are found in arid regions with limited weathering due to dry, cold, or very wet conditions.1
- Intermediate Stage: Features quartz, mica, vermiculite, and smectite. These soils are typical of temperate regions and represent major agricultural soils, indicating moderate weathering and leaching.1
- Advanced Stage: Dominated by kaolin, aluminum, and iron oxides. These soils are found in humid tropics and show intense weathering, acidity, and low fertility due to effective leaching.1
Each stage represents a progression in mineral transformation as rocks break down and alter over time.12
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