Exam 10: Origin and Evolution of the Ocean Floor

___________proposed a hypothesis (that later became a theory)on the creation of atolls.

Water depths and seafloor topography are now routinely determined by _____________.

In the 1870s, the ___________was involved in the first far- reaching, comprehensive study of Earth's oceans.

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

A(n)___________is a volcanic mountain, built up from the seafloor, that never reached the sea surface.

A(n)___________is a low lying, coral reef island perched above a sunken, truncated volcano.

Seamounts ____________.

List several areas on Earth where continental rifting is occurring today. Eventually, what will happen to these areas as rifting continues? Finally, how is continental rifting similar to seafloor spreading and how is it different?

___________are not associated with a mid- ocean ridge.

____________ continental margins typically exhibit wide, extensive, continental shelves.

Which one of the following is not connected in any way with submarine, hot spring vents?

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

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

Geologically, ___________are actually submerged parts of the continents.

Young oceanic lithosphere typically experiences what type of subduction and at what angle?

Geologically, what is the best way to explain the thousands of feet of coral limestone beneath most atolls?

A(n)___________marks the site where old, oceanic lithosphere begins its descent into a subduction zone.

___________is the oceanward edge of a continental shelf.

Submarine canyons found on the continental slope and rise have been created___________ .

Where are most of the current active continental margins located on Earth today? Why? What is the relation of the age of rocks on the ocean floor to the location of these active margins?