grain-size scale

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• grain size scale — ▪ sedimentology  in sedimentology, division of a continuous range of particle sizes into a series of discrete groups. Several such scales have been devised for the purpose of standardizing terms and providing a basis for statistical analysis. On… …   Universalium

• Particle size (grain size) — Particle size, also called grain size, refers to the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. This is different from the crystallite size,… …   Wikipedia

• Grain boundary strengthening — (or Hall Petch strengthening) is a method of strengthening materials by changing their average crystallite (grain) size. It is based on the observation that grain boundaries impede dislocation movement and that the number of dislocations within a …   Wikipedia

• Grain (disambiguation) — Grain refers to course particles (e.g. grain of sand , grain of salt ): *Grain is the small, hard, fruits or seeds of arable crops. Commonly grasses (see caryopsis, Cereals). *Film grain, the gritty texture sometimes apparent on images produced… …   Wikipedia

• Size Strength classification — is a two parameter rock classification based on the strength of intact rock and the spacing of discontinuities in the rock mass. It was developed by Louis and Franklin (1970 75). The size strength approach to rock mass characterisation has been… …   Wikipedia

• Paper size — A size chart illustrating the ISO A series and a comparison with American letter and legal formats …   Wikipedia

• Molecular scale electronics — Part of a series of articles on Nanoelectronics Single molecule electronics …   Wikipedia

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• Sedimentary rock — Middle Triassic marginal marine sequence of siltstones (below) and limestones (above), Virgin Formation, southwestern Utah, USA Sedimentary rock are types of rock that are formed by the deposition of material at the Earth s surface and within… …   Wikipedia

• hydraulic equivalence — ▪ geology       size–density relationship that governs the deposition of mineral particles from flowing water. Two particles of different sizes and densities are said to be hydraulically equivalent if they are deposited at the same time under a… …   Universalium

• metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium