Oxidation of iron in ferromagnesian minerals and dissolution of calcite are two examples of mechanical weathering.

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Oxidation of iron in ferromagnesian minerals is an example of chemical weathering, not mechanical weathering. Dissolution of calcite is also a chemical weathering process, as it involves the chemical breakdown of the mineral by a solvent (usually water). Mechanical weathering refers to physical processes that break down rocks into smaller pieces, such as frost wedging or abrasion.

Oxidation of Iron in Ferromagnesian Minerals and Dissolution of Calcite