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Dating ocean floor

One creationist interconnects that the united of the domain provides may that the ocfan is much younger than the ready accepted age of 4. Short was also a lot less profit on top than way. When two plates discover, one slides beneath the other, professional the sediment by on the ocean floor with it, as posted in the salon below Duxbury et al. Phone created by objects from next, such as meteors, is regulated cosmogenous pay Duxbury et al. This has happened many ancestors throughout Earth's history.

However, the type of sediment on the ocean fllor varies considerably and matches a uniformitarian model. According to Duxbury et al. Sediments that oceam from preexisting rocks are Dating ocean floor terrigenous sediments. They include the sand, rock fragments, wood chips, and anything else that enters the ocean from the land. Oceab powder may be suspended in the ocean for many years and eventually form clay on the ocean floor. Biogenous sediment is produced by marine organisms. This type of sediment includes siliceous ooze and calcareous ooze and is dependent upon the biomass and skeleton formation of organisms inhabiting the water.

According to Rachel James"Diatom oozes generally predominate in deep waters at high latitudes and in areas of coastal upwelling, whereas radiolarian oozes are found at low latitudes. The belt of siliceous sediments round the Antarctic consists of diatom ooze, whereas that in the equatorial Pacific is of radiolarian ooze. This is not consistent with a global flood model because such an event would have caused the seabed's sediments to be intermixed.

Hydrogenous sediment is Daating by chemical reactions Dating ocean floor seawater to form minerals that accumulate as sediment. Sediment created by objects from space, such as meteors, is called cosmogenous sediment Duxbury et al. The distribution tloor sediment is uneven because sediment derived from floof continents stays mostly on the continental shelf, which is the area flooe shallower water around the continents and which is never subducted. Datnig is also a much higher amount of sediment accumulation adjacent to deserts, where the wind blows continental sediment into the ocean.

Humphrey also fails to account for the amount of debris that does not accumulate on the ocean floor. In fact, according to Rachael Jamesonly between one and ten percent of skeletal debris becomes sediment. The rest is dissolved in the ocean water either before reaching the seafloor or shortly afterward. The rate at which skeletal debris is dissolved in the water can also vary greatly with temperature, pressure, and carbon dioxide concentration James Because different sediments have different compositions, some accumulate faster than others, while some are more likely to dissolve in the ocean water. According to Rachael James By contrast, the accumulation rate of siliceous ooze is of the order of a few meters per million years.

Humphrey's argument focuses on subduction at convergent plate boundaries. He overlooks what occurs at divergent plate boundaries, where new ocean crust is being formed.

Dating ocean floor, faq on earth sciences

As two tectonic plates move away from each other, new sediment begins to be deposited on the new seafloor that is created floorr their boundary. The sediment on the young sea floor is not very deep Datng it has not had nearly as much time to accumulate. The older the ocean crust, the more sediment Daitng is covering it. Therefore, the thickness of sediment on new crust flokr be used as crude type of geologic clock. The thickness of sediment is in any particular location is generally consistent with the age of the sea bed and the modern rate flkor accumulation in that region Duxbury et al.

By contrast, a world-wide flood would be expected to distribute a more uniform layer of sediment throughout the oceans. Although the age of the ocean floor Dating ocean floor corresponds to the amount of sediment accumulation, dating the seafloor and its sediments is not a good way to estimate the age of the Earth as Humphreys implies. Because the seafloor is constantly being created and destroyed, the ocean floor is actually much younger than the Earth as a whole. The oldest seafloor has been radiometrically dated to only about million years Duxbury et al. Therefore, the age of the ocean floor is not an accurate tool to measure the age of the Earth.

Further Details These magnetic patterns are parallel to the mid-ocean ridges and symmetrical on both sides. But all of this was wrong. When the lava solidifies at the ridges to form the new seafloor, radioactive elements coming from the mantle are trapped in it. The issue of sediment presented a paradox. During the late s and s huge advances were made in mapping the ocean floors of the world. There was also a lot less sediment on top than predicted. Skip to main content. Early work on the ocean floor had been done by the Challenger expedition in the s, using sounding techniques that involved seeing how far a dating ocean floor with lead at the end would dating ocean floor.

These stripes of normal and reverse magnetic fields with different sizes can be matched with the geomagnetic reversals records obtained from continental rocks already dated: To confirm the ages obtained with magnetic records, and get an absolute age of the seafloor, scientists use the radioactive dating technique. On top there is on average around half a kilometre of sediment figures from Wikipedia: If the Earth's surface was completely static, why had all the mountains on the continents not been worn away by weathering and filled up the oceans as sediment? When scientists probed the rock with echo-sounders, they found that the ocean crust was much thinner than the continental crust and practically the same thickness across the globe.

Further Details See also Wikipedia:


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