Calcareous ooze dominates
ocean sediments
. Organisms with calcium-based shells such as foraminifera are abundant and widely distributed throughout the world’s ocean basins –more so than silica-based organisms.
What environment does calcareous ooze organisms prefer?
They are abundant in all oceans, although most species seem to prefer the
circum-global tropical and subtropical regions
. Distribution of pteropods is limited by water depth, temperature, salinity, oxygen content, and nutrient supply.
Which setting would calcareous ooze be most likely to form?
Calcareous ooze is most likely to be found in
relatively shallow areas with warm surface water
.
How does calcareous ooze form?
Calcareous ooze is a calcium carbonate mud
formed from the hard parts of the bodies of free-floating organisms
. … They form on areas of sea floor distant enough from land so that the slow, but steady deposit of dead micro organisms from overlying water is not obscured by sediments washed from the land.
Which of the following conditions allows for calcareous ooze?
Which of the following conditions allows for calcareous ooze to be found beneath the CCD?
To have it accumulate above the CCD, then have it covered before being transported to deeper depths by sea floor spreading
.
How deep is the calcareous ooze?
The CCD is usually found at depths of
4 – 4.5 km
, although it is much shallower at the poles where the surface water is cold. Thus calcareous oozes will mostly be found in tropical or temperate waters less than about 4 km deep, such as along the mid-ocean ridge systems and atop seamounts and plateaus.
What are the two common types of ooze?
There are two types of oozes,
calcareous ooze and siliceous ooze
. Calcareous ooze, the most abundant of all biogenous sediments, comes from organisms whose shells (also called tests) are calcium-based, such as those of foraminifera, a type of zooplankton.
Which kind of ooze is found deepest?
Carbonate oozes
cover about half of the world’s seafloor. They are present chiefly above a depth of 4,500 metres (about 14,800 feet); below that they dissolve quickly. This depth is named the Calcite Compensation Depth (or CCD).
Why do calcareous oozes form and exist only at shallower depths?
Pacific Ocean
Calcareous globigerina ooze occurs in the shallower parts of the South Pacific,
the dissolving power of the seawater at great depths being sufficient to dissolve calcareous material
to such an extent that these oozes are not generally found at depths in excess of about 15,000…
What is calcareous ooze an example of?
Calcareous ooze is an example of
pelagic biogenous sediment
. The term pelagic means related to the ocean.
What part of the oceans do not have calcareous ooze?
Calcium carbonate dissolves readily under pressure and in cold water, therefore
deeper ocean floors
will have less calcareous ooze.
Why is calcareous ooze found near the ridge?
The distribution of modern calcareous ooze is generally found along mid-ocean ridges and in low-latitude ocean basins. The reason for this occurrence is that
most mid-ocean ridges are at a level higher than the CCD
and that low-latitude ocean basins are typically warm and often not as deep as the CCD.
At what depth would you likely find siliceous ooze?
They are present chiefly
above a depth of 4,500 metres
(about 14,800 feet); below that they dissolve quickly. This depth is named the Calcite Compensation Depth (or CCD).
Where would you expect to find a high concentration of siliceous ooze?
Typically, siliceous ooze is present only in
regions of high biological surface water productivity
(such as the equatorial and polar belts and coastal upwelling areas), where depth of the seafloor is deeper than the CCD.
Where is Radiolarian ooze found?
ocean deposits
Red or brown radiolarian ooze is found along the
zone of the Pacific North Equatorial Current
, east of longitude 170° W, and on the floors of some deep Indonesian basins.
Which of the following are examples of pelagic sediments?
Based upon the composition of the ooze, there are three main types of pelagic sediments:
siliceous oozes, calcareous oozes, and red clays
.
