Oceanography- Chapter 4 quiz attempt 2

What is the rate of deposit for an abyssal clay, pelagic deposit?

1 millimeter (0.04 inch)

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

1966

In what year were gas hydrates discovered?

1976

Approximately how much sediment is carried to the continental margins?

40 trillion pounds

What is the expected calcium carbonate content in modern surface sediments at a latitude of 40 degrees south and a longitude 140 degrees east?

50-80% by weight

China supplies approximately ________ of the current world demand of rare-earth elements.

90%

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.

ANS: Calcareous Lithogenous hydrogenous cosmogenous biogenous

Which one of the following is not considered a "slat" or evaporate mineral?

ANS: Dolomite Gypsum Anhydrite Halite

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.

ANS: Siliceous ooze Rock fragments Clay Volcanic ash Quartz sand

Which type of marine sediments include siliceous and calcareous oozes?

Biogenous

Fossiliferous Limestone is an example of which of the following sediments types?

Biogenous Sediment

Stromatolites are an example of which of the following sediment types?

Biogenous Sediment

Chondrites are an example of which of the following sediment types?

Cosmogenous Sediments

Oolites are an example of which of the following sediment types?

Hydrogenous Sediment

Rock Salt (Halite) is an example of which of the following sediment types?

Hydrogenous Sediment

The K-T boundary contained an unusual clay layer with high proportions of which element?

Iridium

Sediments derived from pre-existing rocks on land are called:

Lithogenous

_______ deposits are found on continental shelves and in shallow waters near island, whereas, _______ deposits are found in deep-ocean basins and are fine grained.

Neritic; Pelagic

Which of the following resources found in ocean sediments has the greatest economic value?

Petroleum

Which of the following sediments are biogenous?

Radiolarian, diatom, & calcareous ooze

Judge the following sentence according to the criteria given below; The majority of lithogenous deposits are composed primarily of quartz BECAUSE quartz is resistant abrasion and can be transported long distances and deposited far from its source area.

The assertion and the reason are both correct, and the reason is valid.

Judge the following sentence according to the criteria given below: Future offshore petroleum exploration will continue in the deeper waters of continental margins BECAUSE offshore petroleum exploration has inevitable oil spills caused by inadvertent leaks or blowouts during the drilling process.

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

The main energy resources associated with marine sediments are petroleum and ________.

gas hydrates

Sediment texture describes_____ characteristics of a deposit.

physical

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