Oceanography Mastering Unit 9
Oolites are less than ________ millimeters in size.
2
Which type of marine sediments include siliceous and calcareous oozes?
Biogenous
Marine sediments provide valuable clues about which of the following Earth history events?
Past catastrophes, such as major extinction events The climate on Earth millions of years ago Previous ocean circulation patterns The ancient geographical locations of ocean basins Movement of the ocean floor
Which of the following organisms are responsible for the creation of siliceous ooze?
Radiolarians Diatoms
Of the following sediments, which one(s) is/are considered biogenous?
Tests of foraminifera Radiolarian ooze
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
According to the Wentworth scale, what is the particle name for a sediment that is above 256 millimeters in size?
boulder
You take a sediment sample from the ocean floor at a depth of 5500 m. The area has low biological productivity and the CCD is at 4500 m depth. Your sample will probably consist of __________.
clay
From smallest to largest, which list of sediment particle sizes is in the correct order?
clay, slit, sand, pebbles
Sediments with an extraterrestrial origin are called:
cosmogenous
Tektites and chondrites fall under which sediment classification?
cosmogenous
Which type of marine sediments include space dust and meteors?
cosmogenous
All the following are examples of lithogenous sediment except :
diatom ooze
Which of the following marine resources is used to make wallboard or sheet rock?
evaporative salts
Which of the following contains calcium carbonate (CaCO3)?
formaniferans
The main energy resources associated with marine sediments are petroleum and ________.
gas hyrates
In general, polar neritic sediment tends to have more ________.
gravel than in tropic waters
Which of the following is a hollow steel tube with a heavy weight on top that is to collect sediment samples?
gravity corer
Oolites are an example of which of the following sediment types?
hydrogenous sediment
Rocks that are composed primarily of calcium carbonate are called ________.
limestone
Volcanic ash is considered to be which type of marine sediment?
lithogenous
Shale is an example of which of the following sediment types?
lithogenous sediment
Turbidite deposits are an example of which of the following sediment types?
lithogenous sediment
The ancient remains of which of the following, buried before they could decompose, are the source of today's petroleum deposits?
microscopic organisms
Sediments found on continental margins are called:
neritic
A sediment sample dominated by microscopic lithogenous sediment grains would be classified as a ___________.
pelagic deposit
One of the most abundance, chemically stable, and durable minerals in the Earth's crust is ________.
quartz
The most abundant mineral in lithogenous sediments is __________.
quartz
All the following are examples of hydrogenous sediment except :
stromatolites
Ocean sediments consist of particles that have slowly settled out of the water by which of the following the processes?
suspension settling
Sediments comprised of grains of roughly the same size are classified as __________.
well sorted
Marine sediments that originate in the warm tropical surface ocean would create deposits in the deep sea composed primarily of ___________.
calcium carbonate
Oozes are uncommon on continental margins because __________.
the biogenous component tends to be overwhelmed by the amount of lithogenous material derived from the nearby continent
According to the Wentworth scale, what is the particle name for a sediment that is 64 to 256 millimeters in size?
cobble
Which of the following contains silica (SiO2)?
radiolarians
Abyssal clay is sometimes referred to as ________.
red clay
Sediment samples from deep beneath the ocean floor are recovered by __________.
rotary drilling
