process of weathering
121microclimate — microclimatic /muy kroh kluy mat ik/, adj. microclimatically, adv. /muy kreuh kluy mit/, n. the climate of a small area, as of confined spaces such as caves or houses (cryptoclimate), of plant communities, wooded areas, etc. (phytoclimate), or of …
122Regolith — (Greek: blanket rock ) is a layer of loose, heterogeneous material covering solid rock. It includes dust, soil, broken rock, and other related materials and is present on Earth, the Moon, some asteroids, and other planets. The term was first… …
123Scapolite — (Gr. asairos , rod, stone), is a group of rock forming silicate minerals composed of aluminium, calcium and sodium silicate with chlorine, carbonate and sulfate. The variations in composition of the different members of the group may be expressed …
124Corrasion — is a geographical term for the process of mechanical erosion of a rock surface caused when materials are transported across it by running water, glaciers, wind, waves or gravitational movement downslope,[1] for example, the wearing away of fine… …
125geography — /jee og reuh fee/, n., pl. geographies. 1. the science dealing with the areal differentiation of the earth s surface, as shown in the character, arrangement, and interrelations over the world of such elements as climate, elevation, soil,… …
126moon — mooner, n. moonless, adj. /moohn/, n. 1. the earth s natural satellite, orbiting the earth at a mean distance of 238,857 miles (384,393 km) and having a diameter of 2160 miles (3476 km). 2. this body during a particular lunar month, or during a… …
127Moon — /moohn/, n. Sun Myung /sun myung/, born 1920, Korean religious leader: founder of the Unification Church. * * * Sole natural satellite of Earth, which it orbits from west to east at a mean distance of about 238,900 mi (384,400 km). It is less… …
128Bauxite — is the most important aluminium ore. It consists largely of the minerals gibbsite Al(OH)3, boehmite γ AlO(OH), and diaspore α AlO(OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase… …
