Exam 13: Divergent Boundaries

Which of the following is not an example of a continental rift?

Why does the Atlantic Ocean have the most extensive abyssal plains?

Which of the following is an example of a mid-ocean ridge?

Submarine canyons found cutting into the continental shelf and slope are believed to have been created ________.

Volcanic islands such as the Hawaiian islands form as a result of ________.

Based on its slow rate of spreading, the East Pacific Rise has a gradual profile with gently sloping sides.

Why are oceanic ridges elevated above the rest of the seafloor?

How do deep-ocean trenches form?

Continental shelves are valuable locations that support important fishing grounds.

What kind of continental margin is visible in this image?

Which of the following scenarios would likely result in the development of a passive continental margin?

Continental shelves on active margins are larger and broader than those on passive margins.

Compare and contrast the formation of accretionary wedges and the process of subduction erosion.

Which of the following is associated with an active continental margin?

A(n)________ is a sequence of layers composing the oceanic crust that includes sheeted dikes, basalts, and gabbro.

The Challenger Deep has previously been measured to have a depth of 10,994 meters.You have been sent to the part of the Pacific Ocean to verify this depth with an echo sounder.Assuming that Depth = 1/2 (1,500 m/sec*echo travel time), approximately how many seconds should it take for the sound wave to leave your ship, strike the bottom of the Challenger Deep, and return if the depth is correct?

Why does the lithosphere thicken as it moves away from a mid-ocean ridge?

Oceanic plateaus form from turbidity currents that flow down the continental slope.

What is the definition of subduction erosion?

Which of the following is a failed rift that formed in North America over one billion years ago?