The following features are shown at example depths to scale though each feature has a considerable range at which it may occur.
The ocean floor is composed of mainly.
It is thinner denser younger and of different.
Known as manganese nodules they are composed of layers of different metals like manganese iron nickel cobalt and copper and they are always found on the surface of the ocean floor.
Oceanic crust oceanic crust extending 5 10 kilometers 3 6 kilometers beneath the ocean floor is mostly composed of different types of basalts.
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The crust overlies the solidified and uppermost layer of the mantle the crust and the solid mantle layer together constitute oceanic lithosphere.
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The ocean floor is made of mostly.
Oceanic crust is about 6 km 4 miles thick.
Silicates mostly compounds made of silicon and oxygen are the most abundant rocks and minerals in both oceanic and continental crust.
The topmost layer about 500 metres 1 650 feet thick includes lavas made of basalt that is rock material consisting largely of plagioclase and pyroxene oceanic crust differs from continental crust in several ways.
A large flat area on the ocean floor composed of sediements that originated mostly on continents.
Round lump of hydrogenous sediment scattered on the ocean floor consisting mainly of manganese and iron and.
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These vary from oozes made of carbonate from foraminiferal and calcareous phytoplankton and some silica that has settled through the water column.
In the deepest parts of the.
Cosmogenous sediments are the remains of space debris such as comets and asteroids made up of silicates and various metals that have impacted the earth.
The ocean floor is made of mostly brainly.
Continental crust is broadly granitic in composition and with a density of about 2 7 grams per cubic cm is somewhat lighter than oceanic crust which is basaltic i e richer in iron and magnesium than granite in composition and has a density of about 2 9 to 3 grams per cubic cm.
One of a series of small rolling hills on the ocean floor that occur next to continental margins or ridges.
Continental shelf 300 feet continental slope 300 10 000 feet abyssal plain 10 000 feet abyssal hill 3 000 feet up from the abyssal plain seamount 6 000 feet.
Most of the seafloor is covered by sediments that average 350 m thick.
This graphic shows several ocean floor features on a scale from 0 35 000 feet below sea level.
Biogenous sediment composed of the silica based shells of single celled animals and algae.
