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
