deep weathering

См. также в других словарях:

• weathering — /wedh euhr ing/, n. 1. Archit. wash (def. 48). 2. material used as a weather strip. 3. Geol. the various mechanical and chemical processes that cause exposed rock to decompose. [1655 65; WEATHER + ING1] * * * Physical disintegration and chemical… …   Universalium

• Weathering — This article is about weathering of rocks and minerals. For weathering of polymers, see Polymer degradation and Weather testing of polymers. Weathering is the breaking down of rocks, soils and minerals as well as artificial materials through… …   Wikipedia

• valley — valleylike, adj. /val ee/, n., pl. valleys. 1. an elongated depression between uplands, hills, or mountains, esp. one following the course of a stream. 2. an extensive, more or less flat, and relatively low region drained by a great river system …   Universalium

• Saprolite — A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; beneath C is bedrock Saprolite is a chemically weathered rock. Saprolites form in the lower zones of soil profiles and represent deep… …   Wikipedia

• duricrust — /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… …   Universalium

• planation surface — ▪ geology Introduction       any low relief plain cutting across varied rocks and structures. Among the most common landscapes on Earth, planation surfaces include pediments, pediplains, etchplains, and peneplains. There has been much scientific… …   Universalium

• Cretaceous Period — Interval of geologic time from с 144 to 65 million years ago. During the Cretaceous the climate was warmer than today. In the seas, marine invertebrates flourished, and bony fishes evolved. On land, flowering plants arose, and insects, bees in… …   Universalium

• eastern Africa — ▪ region, Africa Introduction       part of sub Saharan Africa comprising two traditionally recognized regions: East Africa, made up of Kenya, Tanzania, and Uganda; and the Horn of Africa, made up of Somalia, Djibouti, Eritrea, and Ethiopia.… …   Universalium

• tropical rainforest — Introduction also spelled  tropical rain forest        luxuriant forest, generally composed of broad leaved trees and found in wet tropical uplands and lowlands around the Equator.  Rainforests are vegetation types dominated by broad leaved trees …   Universalium

• Chrysoprase — This article is about the mineral. For the fictional character, see Trolls (Discworld). Chrysoprase (Poland) Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small… …   Wikipedia

• Australia (continent) — Sahul redirects here. For the continental shelf, see Sahul Shelf. Australia (continent) Area 8,468,300 km2 (3,269,629 sq mi) Population 31,260,000 (estim …   Wikipedia