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The pacific is larger than the atlantic because it contains older oceanic floor c.
Deeper regions of the ocean floor tend to be younger. 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. 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. Massive sulfide mineral deposits are common along the mid ocean ridges 4.
Oldest oceanic crust is only present near trenches d. A deeper regions of the ocean floor tend to be younger. 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. C the oldest oceanic crust is present only near trenches.
More than half of the earth s surface formed at a mid ocean ridge 2. 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. Clastic sediments some quite coarse predominate on shelves and slopes. Life may have originated at mid ocean ridges 3.
Oceanic crust is about 6 km 4 miles thick. Plankton is found distributed throughout the world s oceans and is a vital ingredient in the success of many marine animals. In tropical regions ocean islands tend to be surrounded by carbonate reefs. Youngest oceanic crust is near the ridges.
Deeper regions of the ocean floor tend to be younger b. Most of the volcanic eruptions and earthquakes occur along the mid ocean ridges. The oldest sediments are comparatively young because. However at deeper ocean floor such as hundreds to thousands of meters the sediments become lithified.
It is composed of several layers not including the overlying sediment. 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. B the pacific is larger than the atlantic because it contains older oceanic floor. Scentists discovered that seafloor is relatively young because there is no sediments that are older than 150 million years were discovered.
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