What is a turbidity current quizlet?
What are turbidity currents? dense mixtures of sand, mud, and other debris that move at high speeds down submarine canyons.
What exactly is a turbidity current?
A turbidity current is a rapid, downhill flow of water caused by increased density due to high amounts of sediment. Turbidity currents can be caused by earthquakes, collapsing slopes, and other geological disturbances.
Where do turbidites form?
Turbidites are sea-bottom deposits formed by massive slope failures. Rivers flowing into the ocean deposit sediments on the continenal shelf and slope.
What would you expect to find graded bedding?
Convergent active margins will have a steep continental slope, whereas passive margins will have a more gradual slope. Where would you expect to find graded bedding? Each light-colored layer is sandstone that marks the coarser bottom of a graded bedding sequence.
What is calcareous ooze quizlet?
What is calcareous ooze? a fine-grained, deep ocean sediment containing the skeletal remains of calcite-secreting microbes.
Which zone are turbidity currents found?
Turbidites are deposited in the deep ocean troughs below the continental shelf, or similar structures in deep lakes, by underwater turbidity currents (or “underwater avalanches”) which slide down the steep slopes of the continental shelf edge, as illustrated in the diagram.
Why is turbidity current important?
Turbidity currents have historically been described as fast-moving currents that sweep down submarine canyons, carrying sand and mud into the deep sea. Turbidity currents are also important to petroleum geologists because they leave behind layers of sediment that comprise some of the world’s largest oil reserves.
Where is turbidity current located?
1.2. Submarine turbidity current is commonly found in China seas, and it is mainly distributed in Okinawa trough of the East China Sea, continental slope, deep sea basin of the South China Sea, and other waters.
What is turbidity?
Definition Turbidity is the measure of the relative clarity of a liquid. The degree to which its clarity due to suspended particles- more suspended particles, the murkier the water looks Importance / Problems caused by turbidity
What are the factors that affect the turbidity of a lake?
Human Influences- Increases turbidity Increased Urban runoff Construction and cropland near a body of water because the sediment gets put into the water Decreased vegetation leads to increased soil erosion Industrial discharge Bank Erosion- Increases turbidity EVERYTIME Bank erosion increases the amount of sediment that enters the water
How does runoff affect the turbidity of water?
Runoff- Increases turbidity EVERYTIME There are a lot of chemicals in runoff that will increase turbidity Increased runoff = Increased turbidity Water Flow Rate- Decreases turbidity The slower the water is, the less turbid the water is because the suspended particles can settle out of the water
How does bank erosion affect the turbidity of a lake?
Bank Erosion- Increases turbidity EVERYTIME Bank erosion increases the amount of sediment that enters the water Runoff- Increases turbidity EVERYTIME