In geology, a graded bed is one characterized by a systematic change in grain or clast size from the base of the bed to the top. For materials to settle in stratified layers the defining quality is periodicity. There must be repeated depositional events with changes in precipitation of materials over time. Most sedimentary layers show a basically consistent grain size throughout their thickness or show essentially random variations in grain size. However, some beds have their largest particles at the base and gradually move toward the smallest ones at the top. Definition of GRADED BEDDING: Bedding which shows a sorting effect with the coarser material at the base progressively changing upwards to finer sediment at the top.
Graded bedding is a sedimentary structure in which there is an upward gradation from coarser to finer material, caused by the deposition of a heterogeneous suspension of particles. This article explains its definition as well as the actual process. A type of bedding in which each layer displays a gradual and progressive change in particle size, usually from coarse at the base of the bed to fine at the top. Reverso dictionary, English simple definition, English vocabulary.
Definition of Biogenic graded bedding. Biogenic graded bedding. Definition from Science & Technology Dictionaries & Glossaries. Biology Dictionaries. Example sentences with graded bedding, translation memory. Giga-fren. Type of bedding shown by sedimentary deposit when particles become progressively finer from bottom to top. Graded bedding is caused by the differential settling by size and weight of suspended particles in water. For further information: a definition of Graded Bedding by Johanna Strong, Oxford Brookes University.
What Is Graded Bedding?
Conglomerates. Two important and distinctive structural types are recognized as characteristic of particular environments. These are cross-bedding, which is common in fluvial or eolian deposits, and graded bedding, which reflects transport by density (or turbidity) currents or, in certain cases, varved deposits. Defined Term is a resource of legal, industry-specific, and uncommon defined terms to help lawyers draft more clearly, concisely, and accurately. Graded bedding – A bed in which the coarsest particles are concentrated at the bottom and grade gradually upward into fine silt, the whole bed having been deposited by a waning current.