Age Of Ocean Floor Map

Sio reference series 93 30 scripps institution of oceanography.

Age of ocean floor map.

One of the most famous world maps is the 1977 world ocean floor map see above created by bruce heezen and marie tharp a pioneering female oceanographer and kick ass female scientist. A digital age map of the ocean floor. New sea floor map for google earth january 13 2016 in late 2014 we had a look at a map of the ocean floor published by the scripps institution of oceanography university of california san diego. This dataset shows the age of the ocean floor along with the labeled tectonic plates and boundaries.

We ve come a long way in ocean exploration since the days of the hms challenger launched in 1858. Images and animations depicting the crustal age of the ocean floor created by the noaa national centers for environmental information ncei from bathymetric topographic and marine geological and geophysical data. Therefore seafloor dating isn t that useful for studying plate motions beyond the cretaceous. Note that the youngest seafloor ages are found at the mid ocean spreading ridges where new rock is constantly coming up from under the crust to heal the rifts formed as tectonic plates move away from one another.

Prior to the publication of this map scientists had very little idea of what the seafloor looked like on a global. Because of this correlation between age and subduction potential very little ocean floor is older than 125 million years and almost none of it is older than 200 million years. The problem with that approach is that our oceans are vast and ships are small meaning only a tiny percentage of the ocean floor between 5 15 percent nasa estimates was mapped. For that geologists date and study continental crust.

The cracks created by the uplifting fill with pressurized lava that cools and solidifies as new crust. Contours of 20 million years are available as a layer that is currently set to invisible. The data is from four companion digital models of the age age uncertainty spreading rates and spreading asymmetries of the world s ocean basins. Image taken from here.

Ige table 5r below indicates the entire surface of the planet is rising outwardly at the present accelerating rate of 2 85 cm each year 6378 96 km. Seafloor age millions of years 0 20 40 60 80 0 8 this map builds on the tectonic plates map by adding seafloor age data. The magma located under the solid crust is lifting the continents and the ocean floor s.