Marine Science Chapter 5 Test

Why is the average sediment in the Pacific ocean differ from the Atlantic ocean?

Ocean trenches trap the sediment

Poorly sorted sediments would most likely be found in?

eroding shore cliff

Deep ocean sediments are typically composed of what?

fine clays

Sediments that are gray in color tend to be what?

high in silica

Why does eastern North America continue to contain sediment from the last ice age?

lager rivers tend to end up in estuaries

Which area of the ocean has the least amount of sediments?

oceanic ridges

How much of the worlds gas and oil reserves are put into the coninental margin?

1/3

What sediment is abundant in South America?

Biogenous sediments

Sediments of the slope, rise, and deep ocean floor are called what?

Pelagic sediments

Which oceanic sampling device is used to support plate tectonics?

Pistin corer

What is the main source of terrigenous sediment?

River

Most marine sediments are composed of what size of particles?

Sand, silt, and clay.

What is often found in the middle of magenis nodules?

Shark teeth

What is the most abundent marine sediment in volume?

Terrigenous sediment

What type of marine sediment is derived from igneous rock?

Terrigenous sediment

What is an example of an Authigenic sediment?

phosphorite nodules

Particle size distribution largest to smallest?

Boulder, cooble, pebble, granvle, sand,silt, clay

An abundence of Foraminifera shells can be described as what type of sediment?

Calcerous ooze

Which particle size is transported farthest away by wave action?

Clay

The _____________ comprises the highest percentage of ocean area but the least percentage of sediment volume?

Deep ocean floor

What type of deep ocean sediment is most common surrounding the Artic?

Diatom ooze

What occurs below the CCD?

calcium carbonate begins to dissolve

What particle size sinks/settles the fastest?

coarse sand

The White Cliffs of Dover was a result of what type of green organism?

coccolithosphere

Which deposits are the results of gravity propelled currents that produced layers of deposits?

turbidities