erosion time
81Deforestation — For other uses, see Deforestation (disambiguation). Jungle burned for agriculture in southern Mexico …
82Soils retrogression and degradation — in the French school of pedology are two regressive evolution processes associated with the loss of equilibrium of a stable soil. Retrogression is primarily due to erosion and corresponds to a phenomenon where succession reverts back to pioneer… …
83cave — cavelike, adj. /kayv/, n., v., caved, caving. n. 1. a hollow in the earth, esp. one opening more or less horizontally into a hill, mountain, etc. 2. a storage cellar, esp. for wine. 3. Eng. Hist. a secession, or a group of seceders, from a… …
84earth — /errth/, n. 1. (often cap.) the planet third in order from the sun, having an equatorial diameter of 7926 mi. (12,755 km) and a polar diameter of 7900 mi. (12,714 km), a mean distance from the sun of 92.9 million mi. (149.6 million km), and a… …
85Ethiopia — /ee thee oh pee euh/, n. 1. Formerly, Abyssinia. a republic in E Africa: formerly a monarchy. 58,732,577; 409,266 sq. mi. (1,060,000 sq. km). Present boundaries include Eritrea. Cap.: Addis Ababa. 2. Also called Abyssinia. an ancient region in NE …
86dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …
87Niagara Falls — For other uses, see Niagara Falls (disambiguation). Niagara Falls A view of th …
88Viticulture — (from the Latin word for vine ) is the science, production and study of grapes which deals with the series of events that occur in the vineyard. When the grapes are used for winemaking, it is also known as viniculture. It is one branch of the… …
89Another World (TV series) — Another World Title card from 1996 to 1999 Genre Soap opera Created by Irna Phillips William J. Bell …
90Geology of the Grand Teton area — The geology of the Grand Teton area consists of some of the oldest rocks and one of the youngest mountain ranges in North America. The Teton Range, mostly located in Grand Teton National Park, started to grow some 9 million years ago. An older… …
