Search results
Results From The WOW.Com Content Network
A sediment gravity flow is one of several types of sediment transport mechanisms, of which most geologists recognize four principal processes. These flows are differentiated by their dominant sediment support mechanisms, [ 1 ] [ 2 ] which can be difficult to distinguish as flows can be in transition from one type to the next as they evolve ...
Bouma A is the first layer deposited by a flow, provided the flow has sufficient energy. Otherwise Bouma B, C or D will be the first layer deposited. Bouma A is deposited when the flow energy is high enough that fluid turbulence is able to keep the coarsest grains in suspension. When energy drops below a critical level, the grains tend to ...
A turbidite is the geologic deposit of a turbidity current, which is a type of amalgamation of fluidal and sediment gravity flow responsible for distributing vast amounts of clastic sediment into the deep ocean.
Sediment transport is the movement of solid particles , typically due to a combination of gravity acting on the sediment, and the movement of the fluid in which the sediment is entrained.
Flow characteristics can be characterized by the Froude and Reynolds numbers, which represent the ratio of flow speed to gravity (buoyancy) and viscosity, respectively. [3] Gravity current from a lock-exchange release interacting with a submerged obstacle mounted at the bottom. Result from a 3D computational fluid dynamics (CFD) simulation.
The Hjulström curve, named after Filip Hjulström (1902–1982), is a graph used by hydrologists and geologists to determine whether a river will erode, transport, or deposit sediment. It was originally published in his doctoral thesis "Studies of the morphological activity of rivers as illustrated by the river Fyris. [1]" in 1935. The graph ...
When reworking stops, suspension settling may deposit massive mudstone (Bouma E) directly on top of the laminated layer. Alternatively, if new sediment is introduced during this reworking phase, or if sediment is sufficiently remobilized and transported, then a more complete Bouma sequence may develop on top of the S3 layer. [2]
Grain flows (sand avalanches) on the slip faces of sand dunes at Kelso in the Mojave Desert, California.. A grain flow is a type of sediment-gravity flow in which the fluid can be either air or water, acts only as a lubricant, and grains within the flow remain in suspension due to grain-to-grain collisions that generate a dispersive pressure to prevent further settling.