OCE CH 4

45 terms by omgdiannax3 

Ready to study?
Start with Flashcards

Create a new folder

Advertisement Upgrade to remove ads

diatomaceous ooze

biogenous sediment

foraminiferans

biogenous sediment

halite

hydrogenous sediment

manganese nodules

hydrogenous sediment

metal sulfides

hydrogenous sediment

oolites

hydrogenous sediment

silaceous ooze

biogenous sediment

stromatolites

biogenous sediment

tektites

cosmogenous sediment

CCD

depth at which all carbonate is in solution

ice rafting

associated with glacial deposits

lysocline

depth at which carbonate begins to dissolve

turbidite

associated with deep sea fans

Wentworth Scale

particle size classification

Texture refers to the size and shape of sediment particles.

True

Sediments derived from weathered rock and volcanic activity are called biogenous sediments

False

Beach sand is usually well-sorted

True

A glacial deposit is well-sorted

False

A well-sorted sand deposit with rounded particles might be called immature

False

The Wentworth scale is used to arrange the amount of sorting in a sediment deposit

False

Calcareous shells will not accumulate on the ocean floor when the water depth exceeds about 4500 meters
(around 15,000 feet).

True

The deposition of radiolarian oozes is affected by the carbonate compensation depth

False

Radiolarian oozes form near the equator

True

Phosphate nodules are found on the continental shelf.

True

Organisms that live on the ocean floor may be responsible for keeping manganese nodules from being buried in
the sediment.

True

The major force bringing continental sediments to the open ocean is (are):

Wind

Sediments which are poorly sorted and made of a variety of minerals could have been deposited by:

a glacier

Which of the following contains calcium carbonate (CaCO3)?

foraminiferans

Which of the following contains silica (SiO2)?

radiolarians

Sediments derived form preexisting rocks are called:

lithogenous

Sediments produced by plants and animals in the sea called:

terriginous

Sediments produced as a result of chemical reactions in seawater are called:

hydrogenous

Sediments with an extraterrestrial origin are called:

cosmogenous

All of the following are lithogenous sediments

a. beach sand.
c. glacial deposits.
d. illite clays.
e. volcanogenic particles.

Manganese nodules are an example of a:

hydrogenous sediments.

All of the following are hydrogenous sediments

a. evaporites.
b. halites.
c. manganese nodule.
d. phosphates.

The element found in some sediments which suggest that a meteorite or asteroid impact occurred nearby is:

iridium

The most likely place to find abundant manganese nodules is on the

abyssal plain far from a continent

In contrast to manganese nodules which form on the abyssal plain, phosphate-rich nodules form in:

intermediate to shallow depth water

Sediments found on continental margins are called

neritic

In general, polar neritic sediment has more:

rock and gravel than in tropical waters

A pelagic clay contains lots of material that settle to the seafloor through the water column and are:

less than 30% biogenous material.

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

fecal pellets

evaporation

increase seawater salinity

high temperature

increase seawater salinity

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set