The four main types of weathering include freeze-thaw, exfoliation, chemical and biological weathering. Weathering involves the process of rock breaking down into soil via various physical, biological and chemical reactions.Know More
The freeze-thaw method of weathering takes place when water penetrates small cracks in the rock and then freezes. When the water freezes, it expands, causing the crack in the rock to be placed under pressure and expand. The ending result is a break in the rock. The broken rock pieces can then break down further in the weathering process.
Exfoliation, also called onion skin weathering, involves the dramatic temperature changes on the rock. During the day, the rock is exposed to elevated temperatures, and at night, the rock is subjected to much cooler temperatures. This effect over an extended period of time results in a "flaking" effect on the rock.
Chemical weathering can take place in a rock when water, which seeps into the rock, contains amounts of acid, causing a chemical breakdown of the rock. This especially affects limestone, and it can be seen on buildings and other structures that are built with limestone rock.
Biological weathering involves effects from a living organism, such as a tree or moss. Tree roots can break rocks apart, and moss can break down the surface of a rock over a longer period of time.Learn more about Erosion & Weathering
Mechanical weathering may occur due to thermal fractioning, frost wedging, hydration shattering, exfoliation and abrasion. During mechanical weathering, external forces cause solid rock material to break into smaller sediments.Full Answer >
The four types of erosion are sheet erosion, rill erosion, gully erosion and splash erosion. Erosion is defined as the withering away of the surface of land by either rain or irrigation water, wind or ice.Full Answer >
Weathering occurs when materials are eroded or broken down by natural means, such as ice, water and wind. Acid, plants and animals can also cause weathering.Full Answer >
Biological weathering is the effect that living organisms, such as plants and animals, have on rocks and other inanimate objects. This phenomena happens due to the molecular breakdown of minerals in the rock. When biological weathering occurs, the living organism breaks down the rock or other nonliving object through either mechanical or chemical erosion or the use of both.Full Answer >