Where is turbidite found?
Turbidites are deposited in the deep ocean troughs below the continental shelf, or similar structures in deep lakes, by underwater avalanches which slide down the steep slopes of the continental shelf edge.
What is the difference between turbidite and turbidity current?
The driving force behind a turbidity current is gravity acting on the high density of the sediments temporarily suspended within a fluid. The sedimentary deposit of a turbidity current is called a turbidite.
What is a turbidite quizlet?
Turbidites: -the sediment that is deposited by a turbidity current is called a turbidite. -These are well-sorted and well-graded sediments (which means that as the current speed slows down progressively finer sediments are deposited. ) -Turbidites are found on continental slopes and rises.
What is Contourite in geology?
A contourite is a sedimentary deposit commonly formed on continental rise to lower slope settings, although they may occur anywhere that is below storm wave base. The geomorphology of contourite deposits is mainly influenced by the deepwater bottom-current velocity, sediment supply, and seafloor topography.
How is turbidite created?
Turbidites are sea-bottom deposits formed by massive slope failures. These slopes fail in response to excessive sedimentation load and sometimes earthquake shaking, sending the sediments sliding down to the ocean bottom to create a turbidite.
What is turbidite rock?
turbidite, a type of sedimentary rock composed of layered particles that grade upward from coarser to finer sizes and are thought to have originated from ancient turbidity currents in the oceans.
Why do turbidite beds fine upward?
The rocks fine upward as the flow slows, resulting in the bouma sequence. The wavy line at the base of Bouma a in Figure 7 indicates an erosional surface, and flute casts or scour marks are sometimes present.
What is a turbidite in geology?
What is turbidite made of?
Turbidites are sea-bottom deposits formed by massive slope failures. Rivers flowing into the ocean deposit sediments on the continenal shelf and slope.
What is the best definition of a turbidite?
Definition of turbidite : a sedimentary deposit consisting of material that has moved down the steep slope at the edge of a continental shelf also : a rock formed from this deposit.
What are Contourite drifts?
Contourite drifts, also known as sediment drifts, result from near-bottom currents usually flowing in deep water in response to thermohaline and wind-driven circulation (Faugères & Stow 2008). They are present throughout the world’s oceans and can be found anywhere from the abyssal floor to outer shelf settings.
What is a turbidite system?
Turbidite systems, also known as submarine fans, are downslope systems built mainly by turbidity currents and other mass flows (Fig. 3 A ).
Is the turbidite paradigm defective?
The turbidite paradigm is fundamentally defective because it is built on facies models, such as the “Bouma sequence” ( Fig. 3.52) for classic turbidites deposited by low-density turbidity currents ( Bouma, 1962) and the “Lowe sequence” ( Fig. 3.53B) for coarse-grained turbidites deposited by high-density turbidity currents (HDTCs; Lowe, 1982 ).
What are the characteristics of turbiditic sediments?
Freshly deposited turbiditic sediments contain relatively well-oxygenated pore water and a relatively high amount of food. At first, the sediment is colonized by small opportunistic deposit feeders producing Phycosiphon, rather than by the larger sediment-feeding producers of Nereites ( Fig. 8.10 ).
How useful is the diagram of the brain for class 10-12?
The diagram of the brain is useful for both Class 10 and 12. It is one among the few topics having the highest weightage of marks and is frequently asked in the examinations. A well-labelled diagram of a human brain is given below for further reference. The human brain is divided into three main parts: