Oceanography- Chapter 4 quiz attempt 1

How many years ago was the last ice age?

10,000 years ago

In what year was the Deep Sea Drilling Project (DSDP) initiated?

1968 (according to the glossary -though it was counted as wrong...?) 1966 (according to prof. slides)

Sediments that are poorly sorted were most likely deposited by:

A glacier

Which of the following is the most dominant sediment in the deepest ocean basin- the north pacific?

Abyssal clay

Where can stromatolites be found?

Australia

When looking at the world ocean totals combined, which is the most dominant sediment worldwide?

Calcareous ooze

Chondrites are an example of which of the following sediments?

Cosmogenous sediment

The dissolution of the thick tests of foraminifers below the CCD is an example of the ______of biogenous sediment.

Destruction

Examine the five words and/or phrases and determine the relationship among the majority of words/phrases. Choose the one option that does not fit the pattern.

Foraminiferans, Rafdiolarians, Coccolithophores, Diatoms, ANS: Oolites

Which of the following contains the most organic carbon on earth?

Gas hydrates

Which of the following is a hollow steel tube with a heavy weight on top that is to collect sediment samples?

Gravity Corer

Whats does JOIDES stand for?

Joint Oceanographic Institutions for Deep Earth Sampling

Sandstone is an example of which of the following sediment types?

Lithogenous Sediment

How many holes have been drilled into the sea floor using a drill ship to collect cores for scientific study?

More than 200

______ deposits are found on continental shelves and in shallow water near islands, whereas, _________ deposits are found in deep-ocean basins and are fine grained.

Neritic; Pelagic

Which part of the ocean is considered to be the most climatically sensitive regions on Earth?

North Atlantic

Which of the following sediments are Biogenous?

Radiolarian, diatom, & calcareous ooze

Which type of sampling did JOIDES resolution conduct?

Rotary drilling

Which of the following is a biogenous sediment?

Stromatolites

Judge the following sentence according to the criteria given below: Diatoms need strong sunlight and are found only within the upper, sunlit surface waters of the ocean BECAUSE the provide most of the silica in biogenous ooze.

The assertion and the reason are both correct, bu the reason is invalid

Judge the following sentence according to the criteria given below: Abyssal clays are commonly red-brown or buff in color BECAUSE they contain gypsum.

The assertion is correct, but the reason is incorrect

Collecting adequate samples from which of the following is most difficult

The deep-ocean floor

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A very important way to increase the settling rate of fine particles is the open ocean is via

fecal pellets

The particles found in some sediment that suggest that an extraterrestrial impact event are _____.

tektites