Which of the following geochemical processes governs the transformation of ferromagnesian minerals into secondary clay minerals and iron oxides within the deeply weathered profiles of tropical upland regions?

💡 Solution & Explanation

Hydrolysis involves the chemical reaction between water and mineral silicates, breaking down primary minerals and leading to the leaching of silica while leaving insoluble iron and aluminum sesquioxides behind. This intense chemical weathering under high temperature and moisture regimes forms the basis of laterite soil genesis. Frost shattering is restricted to high-latitude or extremely high-altitude alpine zones rather than humid tropical uplands. Chemical weathering rates accelerate exponentially in warm and wet climates.