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In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer ones. Normally graded beds generally represent depositional environments which decrease in transport energy (rate of flow) as time passes, but these beds can also form during rapid depositional events. They are perhaps best represented in turbidite strata, where they indicate a sudden strong current that deposits heavy, coarse sediments first, with finer ones following as the current weakens. They can also form in terrestrial stream deposits.

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  • Gradierte Schichtung
  • Graded bedding
  • Gegradeerde gelaagdheid
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  • Die gradierte Schichtung ist ein Gefügemerkmal bestimmter Sedimentgesteine, bei dem die Größe der Sedimentpartikel von der Schichtbasis zur Oberseite hin abnimmt.
  • Gegradeerde gelaagdheid (Engels: graded bedding) is een structuur en textuur in sommige sedimentaire gesteenten, waarbij binnen een gesteentelaag de korrelgrootte naar boven toe afneemt. Gegradeerde gelaagdheid kan iets zeggen over het afzettingsmilieu van het gesteente. Het kan ook als top-bottomcriterium gebruikt worden.
  • In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer ones. Normally graded beds generally represent depositional environments which decrease in transport energy (rate of flow) as time passes, but these beds can also form during rapid depositional events. They are perhaps best represented in turbidite strata, where they indicate a sudden strong current that deposits heavy, coarse sediments first, with finer ones following as the current weakens. They can also form in terrestrial stream deposits.
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  • Die gradierte Schichtung ist ein Gefügemerkmal bestimmter Sedimentgesteine, bei dem die Größe der Sedimentpartikel von der Schichtbasis zur Oberseite hin abnimmt.
  • In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer ones. Normally graded beds generally represent depositional environments which decrease in transport energy (rate of flow) as time passes, but these beds can also form during rapid depositional events. They are perhaps best represented in turbidite strata, where they indicate a sudden strong current that deposits heavy, coarse sediments first, with finer ones following as the current weakens. They can also form in terrestrial stream deposits. In reverse or inverse grading the bed coarsens upwards. This type of grading is relatively uncommon but is characteristic of sediments deposited by grain flow and debris flow. It is also observed in Aeolian processes. These deposition processes are examples of granular convection.
  • Gegradeerde gelaagdheid (Engels: graded bedding) is een structuur en textuur in sommige sedimentaire gesteenten, waarbij binnen een gesteentelaag de korrelgrootte naar boven toe afneemt. Gegradeerde gelaagdheid kan iets zeggen over het afzettingsmilieu van het gesteente. Het kan ook als top-bottomcriterium gebruikt worden.
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