abrasion agate amygdule andesite arkose
The process of weathering caused by solid particles hitting or rubbing against rocks is called abrasion. This physical process can gradually wear down the surface of rocks over time, leading to erosion and a change in their appearance.
Ventifacts are formed by the abrasion of rocks by windblown sand. These are rocks shaped or polished by the erosive action of wind-carried particles.
After abrasion, such as being tumbled in a stream, the shape of rocks becomes smoother and more rounded. Continued abrasion can wear down sharp edges and angles, creating more rounded and polished surfaces on the rocks.
Abrasion
GraniteLimestoneDioriteBasaltChalkLimestoneSandstoneBrecciaConglomerateGabbroRhyoliteObsidianPumiceMarbleSchistGneissMetaconglomerate
Some examples of rocks that absorb odors include activated charcoal, zeolite, and lava rocks. These rocks have porous surfaces that can trap and neutralize odors in the air.
weathering
Deflation wind is when the wind blows across loose sediments and carries them away.
Abrasion is a type of mechanical weathering that occurs when rocks are physically broken down by the friction and impact of other rocks, sand, or sediment. This process does not involve any chemical reactions.
Two examples of mechanical weathering along the ocean are abrasion, where waves and currents cause rocks to rub against each other and break down, and salt crystal growth, where saltwater infiltrates cracks in rocks, evaporates, leaving salt crystals that expand and cause the rocks to break apart.
Examples of non-foliated metamorphic rocks are quartzite and marble.