process of weathering
71Africa — /af ri keuh/, n. 1. a continent S of Europe and between the Atlantic and Indian oceans. 551,000,000; ab. 11,700,000 sq. mi. (30,303,000 sq. km). adj. 2. African. * * * I Second largest continent on Earth. It is bounded by the Mediterranean Sea,… …
72duricrust — /door i krust , dyoor /, n. a hard crust that forms on or in soil in semiarid climates owing to cementation of soil particles. Cf. caliche, hardpan (defs. 1, 2). [ < L dur(us) hard + I + CRUST] * * * ▪ geology Introduction surface or near… …
73Marine terrace — A marine terrace, coastal terrace[1], raised beach or perched coastline is a relatively flat, horizontal or gently inclined surface of marine origin[2], mostly an old abrasion platform which has been lifted out of the sphere of wave activity… …
74Steel — For other uses, see Steel (disambiguation). The steel cable of a colliery winding tower …
75climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …
76industrial polymers, major — Introduction chemical compounds used in the manufacture of synthetic industrial materials. In the commercial production of plastics, elastomers, man made fibres, adhesives, and surface coatings, a tremendous variety of polymers are… …
77Sulfur — This article is about the chemical element. For other uses, see Sulfur (disambiguation). phosphorus ← sulfur → chlorine …
78Electromechanical disintegration — is a process in geomorphology in which lightning interacts in erosion and weathering.An excellent example of this phenomenon is fracturing in the quartz formations of the Espinaςo mountains of Brazil. For many years, itinerant miners in these… …
79Stabilizers for polymers — are used directly or by combinations to prevent the various effects such as oxidation, chain scission and uncontrolled recombinations and cross linking reactions that are caused by photo oxidation of polymers. Polymers are considered to get… …
80atmosphere — atmosphereless, adj. /at meuhs fear /, n., v., atmosphered, atmosphering. n. 1. the gaseous envelope surrounding the earth; the air. 2. this medium at a given place. 3. Astron. the gaseous envelope surrounding a heavenly body. 4. Chem. any… …
