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sedimentary bed

См. также в других словарях:

  • 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 facies — Different, but contemporaneous and juxtaposed, sedimentary rocks. Terrigenous facies are accumulations of particles eroded from older rocks and transported to the depositional site. Biogenic facies are accumulations of whole or fragmented shells… …   Universalium

  • Sedimentary structures — are those structures formed from sediment. There are two kinds of flow regimes, which at varying speeds and velocities produce different structures. In the lower flow regime, the natural progression is from a flat bed, to some sediment movement… …   Wikipedia

  • 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

  • bed — /bɛd / (say bed) noun 1. a piece of furniture upon which or within which a person sleeps. 2. the mattress and bedclothes together with the bedstead. 3. the bedstead alone. 4. the use of a bed for the night; lodging. 5. a place for sexual… …  

  • bed —    [ stratigraphy ]    The layer of sediments or sedimentary rocks bounded above and below by more or less well defined bedding surfaces. The smallest, formal lithostratigraphic unit of sedimentary rocks. The designation of a bed or a unit of… …   Glossary of landform and geologic terms

  • Bed (geology) — In geology a bed is the smallest division of a geologic formation or stratigraphic rock series marked by well defined divisional planes (bedding planes) separating it from layers above and below. A bed is the smallest lithostratigraphic unit,… …   Wikipedia

  • bed —    1. A layer in sedimentary rocks; a stratum [10].    2. A sedimentary deposit of relatively small thickness and great areal extent, separated by bedding planes from over and underlying deposits [16] …   Lexicon of Cave and Karst Terminology

  • Bone bed — A bone bed is any geological stratum or deposit which contains bones of whatever kind. Inevitably, such deposits are sedimentary in nature. Not a formal term, it tends to be used more to describe especially dense collections. It is also applied… …   Wikipedia

  • Flaser bed — Flaser beds are a sedimentary bedding pattern created when a sediment is exposed to intermittent flows, leading to alternating sand and mud layers. While flaser beds typically form in tidal environments, they can (rarely) form in fluvial… …   Wikipedia

  • marker bed — ▪ geology also called  Key Bed,         a bed of rock strata that are readily distinguishable by reason of physical characteristics and are traceable over large horizontal distances. Stratigraphic examples include coal beds and beds of volcanic… …   Universalium

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