Exam 13: The Ocean Floor

Which of the following is not true of deep ocean trenches?

What type of continental margin is illustrated in the diagram below?

The best definition of the outer edge of the continental shelf is that point where______ .

Discuss the distribution of seafloor sediments in the ocean basins. What are the different types of sediments, and what are the factors that control their distribution geologic setting, climate, etc..?

Much of the Gulf of Mexico is underlain by thick layers of salt that formed in a small ocean basin like the Red Sea, which formed from sea floor spreading. This salt is a good example of ______ .

Radiolarian chert is produced in the deep sea by the accumulation of siliceous radiolarian shells. What kind of sediment is radiolarian chert?

An_______ marks the site where old, oceanic lithosphere begins its descent into a subduction zone.

The principal technique for finding ocean depth today is_______ .

Which ocean has the greatest average depth?

______develop where oceanic lithosphere bends downward and sinks into the mantle.

Valleys that lead from the continental shelf into deeper waters are known as _______ .

Why is manganese not mined on the seabed given that there are abundant manganese nodules in some parts of the ocean floor?

In the Mississippi River delta in south Louisiana shallow subsurface imaging of the sediments reveal buried channels beneath delta sediments that are less than 10,000 years old that extend offshore past the modern continental shelf. What is a simple explanation for these buried channels?

Manganese nodules are an example of______.

Seafloor hot springs occur mainly in_______ .

A prominent feature of the Mid- Atlantic Ridge is a very deep linear valley known as an_______ valley.

Give the correct type of ocean floor sediment for each phrase. -Calcareous ooze

The gently sloping submerged surface extending from the shoreline toward the deep ocean is termed the continental_______ .

The oceans cover approximately ______ percent of Earth's surface.

Turbidites are_______ sediments.