Definitions for "Mechanical weathering"
the process by which rock is broken down into smaller fragments as result of physical forces; for example, water may seep into cracks in rocks, freeze and expand, thus breaking up the rock.
The process by which a rock or mineral is broken down into smaller fragments without altering its chemical makeup; weathering that affects only physical characteristics. See also chemical weathering.
A general term applied to a variety of weathering processes that result in the particle size reduction of rock materials with no change in composition. Frost action, salt crystal growth and pressure relief fracturing are examples. Also known as physical weathering.