Exam 11: The Ocean Floor

________ marks the edge of a continent.

What are the flattest and most level places on Earth?

Water depths and seafloor bathymetry (submarine topography)are now routinely determined by ________.

Which method did not contribute significant geologic knowledge about the rocks, structures, and mineral deposits of the mid-ocean ridges?

What geologic studies finally confirmed Darwin's hypothesis that coral atolls all had a volcanic substrate underneath that formed the original platform for corals to colonize?

The sequence layers that comprise the oceanic crust is call an ________.

Below the coral limestone, surface rocks of an atoll, what would you find?

________ is the oceanward edge of a continental shelf.

Which ocean floor sediment type comprises complex metallic lumps?

Which ocean floor sediment type includes quartz sand?

The illustration below is a topographic profile of a passive continental margin.Fill in the blanks with the correct name of the feature labeled.

Which ocean floor sediment type includes abyssal plain clay?

Name two types of metal-rich sea-floor sediments.

What is the most readily observable change in the seafloor as it moves away from the position of the mid-ocean ridges?

The continental rise lies at the top of the continental slope.

The basis for life in the black smoker vent communities is chemosynthetic bacteria that derive energy from the sulphide-rich vent fluids.

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Which one of the following statements concerning actively spreading mid-ocean ridges is false?

The west coast of South America and the east coast of North America have very different continental margins.

________ is/are most soluble in cold seawater at ocean depths in excess of 4500 metres.