Exam 3: The Sea Floor and Its Sediments

The seafloor tends to be more flat and featureless than the continental areas.

Submarine canyons are associated with ________.

Flat-topped seamounts called guyots are formed when volcanic islands subside and are eroded over time.

Geologic dredges are used to quantitatively sample the seafloor.

Manganese nodules are ________.

The deep ocean basins or areas with depth between 4000 m and 6000 m cover more of the Earth's surface than the continents.

In general, coarse sediments are found closer to shore and fine sediments are found further offshore.

The deepest parts of the oceans are associated with all of the following except ________.

The distinctive layering found in marine sediments indicates that the properties of the sediment and the rates of sedimentation have varied with time.

The deep-sea floor, between 4000 and 6000 m depth, covers more of Earth's surface than the continents.

The sediments of the central deep-ocean basins of the North Pacific are formed chiefly from ________.

The first scientific voyage to use an echo sounder on a large scale was the ________.

Calcareous deposits are most likely to be found in more acidic seawater undersaturated in calcite.

Which of the following is most likely a major component of marine sediments near the continents?

Manganese nodules are composed entirely of manganese.

The east coast of South America ________.

The predominant modern-day method in determining the depth and nature of the seafloor uses ________.

Sediments found on the seafloor and attributed to processes no longer in existence are called ________.

Red clays can be categorized as ________.

The continental shelf on the east coast of the United States. is generally wider than the continental shelf on the west coast of the U.S.