saltation
111Gradualism — is the belief that changes occur, or ought to occur, slowly in the form of gradual steps (see also incrementalism)Politics and societyIn politics, the concept of gradualism is used to describe the belief that change ought to be modified in small …
112Heredity — is the passing of traits to offspring. This is the process by which an offspring cell or organism acquires or becomes predisposed to the characteristics of its parent cell or organism. Through heredity, variations exhibited by individuals can… …
113Myelin — Structure of a typical neuron Myelin sheath Dendrite …
114Punctuated equilibrium — is a theory of evolutionary biology which states that most sexually reproducing populations experience little change for most of their geological history, and that when phenotypic evolution does occur, it is localized in rare, rapid events of… …
115Beach — A beach is a geological landform along the shoreline of a body of water. It usually consists of loose particles which are often composed of rock, such as sand, gravel, shingle, pebbles, or cobble. The particles of which the beach is composed can… …
116Avalanche — This article refers to the natural event. For other uses, see Avalanche (disambiguation) An avalanche is an abrupt and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are among the biggest dangers in the… …
117Dust — For other uses, see Dust (disambiguation). A dust storm blankets Texas homes, in 1935. Dust consists of particles in the atmosphere that arise from various sources such as soil dust lifted up by wind (an Aeolian process), volcanic eruptions, and… …
118Ventifact — U.S. Geological Survey Photographic Library ( http://libraryphoto.cr.usgs.gov/ )] Atacama Province, Chile (Segerstrom, 1962) [Segerstrom, K. 1962. Deflated marine terrace as a source of dune chains, Atacama Province, Chile. In: Geological Survey… …
119Sastruga — ] Sastrugi or zastrugi are sharp irregular grooves or ridges formed on a snow surface by wind erosion and deposition, and found in polar and temperate snow regions. They differ from sand dunes in that the ridges are parallel to the prevailing… …
120Fluvial — is used in geography and earth science to refer to the deposits and landforms created by the action of rivers or streams and the processes associated with them. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the… …
