Deeper Regions Of The Ocean Floor Tend To Be Younger

B the pacific is larger than the atlantic because it contains older oceanic floor.

Deeper regions of the ocean floor tend to be younger.

Except within a few kilometers of a ridge crest where the volcanic rock is still relatively young most parts of the sea floor are covered in sediments. A the rocks of the underlying ocean floor react chemically with the lowest sediments converting them directly into rock b the ocean floor is recycled through plate tectonics dragging the oldest sediments into the mantle at subduction zones. The pacific is larger than the atlantic because it contains older oceanic floor c. Smaller aquatic animals tend to live in the shallower regions and the larger animals live in the deeper regions generally along the continental shelves beneath the waves.

Oceanic crust is about 6 km 4 miles thick. A deeper regions of the ocean floor tend to be younger. Clastic sediments some quite coarse predominate on shelves and slopes. C the oldest oceanic crust is present only near trenches.

It is composed of several layers not including the overlying sediment. The oldest sediments are comparatively young because. Scentists discovered that seafloor is relatively young because there is no sediments that are older than 150 million years were discovered. Plankton is found distributed throughout the world s oceans and is a vital ingredient in the success of many marine animals.

This material comes from several different sources and is highly variable in composition depending on proximity to a continent water depth ocean currents biological activity and climate. Life may have originated at mid ocean ridges 3. More than half of the earth s surface formed at a mid ocean ridge 2. Youngest oceanic crust is near the ridges.

Almost all of the sea floor is covered by young sediments and sedimentary rocks derived either from erosion of continents or from marine biological processes. The ocean floor sediments near the surface remain unconsolidated. However at deeper ocean floor such as hundreds to thousands of meters the sediments become lithified. Massive sulfide mineral deposits are common along the mid ocean ridges 4.

Oldest oceanic crust is only present near trenches d. In tropical regions ocean islands tend to be surrounded by carbonate reefs. Most of the volcanic eruptions and earthquakes occur along the mid ocean ridges. Oceanic crust the outermost layer of earth s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges which occur at divergent plate boundaries.