Deeper Regions Of The Ocean Floor Tend To Be Younger

The oldest sediments are comparatively young because.

Deeper regions of the ocean floor tend to be younger.

Oceanic crust is about 6 km 4 miles thick. B the pacific is larger than the atlantic because it contains older oceanic floor. Youngest oceanic crust is near the ridges. In tropical regions ocean islands tend to be surrounded by carbonate reefs.

C the oldest oceanic crust is present only near trenches. Which evidence supports the theory of seafloor. Scentists discovered that seafloor is relatively young because there is no sediments that are older than 150 million years were discovered. Massive sulfide mineral deposits are common along the mid ocean ridges 4.

The pacific is larger than the atlantic because it contains older oceanic floor c. 1 basaltic rock is found to be progressively younger at increasing distances from a mid ocean ridge 2 marine fossils are often found in deep well drill cores 3 the present continents appear to fit together as pieces of a larger land mass 4 areas of shallow water seas tend to accumulate sediment which gradually sinks also please help me with. It is composed of several layers not including the overlying sediment. 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.

However at deeper ocean floor such as hundreds to thousands of meters the sediments become lithified. Most of the volcanic eruptions and earthquakes occur along the mid ocean ridges. Plankton is found distributed throughout the world s oceans and is a vital ingredient in the success of many marine animals. 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.

More than half of the earth s surface formed at a mid ocean ridge 2. Oldest oceanic crust is only present near trenches d. 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. A deeper regions of the ocean floor tend to be younger.

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. Clastic sediments some quite coarse predominate on shelves and slopes. The ocean floor sediments near the surface remain unconsolidated. 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.