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The Mediterranean Sea is home to what could be the world ’s oldest pelagic crust , an undisturbed part of Earth ’s outermost shell that scientists say is about 340 million year quondam .
Most pelagic crust is less than 200 million days old , because it is typicallyrecycled back into the Earth ’s mantleat subduction zones ( where two architectonic photographic plate collide ) . But a new study express that part of the easterly Mediterranean Sea may contain the oldest get it on pelagic gall .
Much of this region’stectonic characteristicsare uncertain because of its thick sedimentary cover and deficiency of magnetized data . In the new study , research worker used magnetic sensing equipment to profile areasof the eastern Mediterranean . [ Photo Timeline : How the Earth Formed ]
" Changes in the magnetic field ’s orientation over time are recorded in the sea floors , creating a unequaled bar code that provides a time stamp for crust formation , " study author Roi Granot , a geologist at Ben - Gurion University of the Negev in Israel , said in a argument . " The results disgorge unexampled light on the tectonic architecture and phylogeny of this region and have important implications on various geodynamic cognitive operation . "
In an analysis of these " prevention code , " Granot ascertain that rocks in the so - called Herodotus Basin , site in the eastern Mediterranean , had magnetic stripes tie in withoceanic crustformed at a mid - ocean ridge . The cooling of magma at a mid - ocean ridge magnetizes the minerals in new take shape rock , which align with the direction of Earth ’s magnetic arena , allot to the study . Granot said the ancient crust in this part of the eastern Mediterranean could be remnants of one of Earth ’s early oceans , Tethys , which existed long before the Atlantic and Native American oceans . If that idea is right , these findings show that the ancient Tethys Ocean formed much in the first place than scientists previously thought .
" With the new geophysical data point , we could make a large step forwards in our geological agreement of the area , " Granot articulate .
The new field was published online Aug. 15 in thejournal Nature Geoscience .
Original article onLive Science .
