Udden grade scale

См. также в других словарях:

• 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

• 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

• 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

• 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