Sentences with phrase «recycled oceanic crust»

But volcanoes were still spewing into the atmosphere large amounts of carbon from recycled oceanic crust.

It has long been suggested that Earth's mantle contains several different compositional reservoirs, including an ancient more - primitive reservoir at the lowermost mantle, recycled oceanic crust and depleted background mantle.

Not exact matches

New research from a team including Carnegie's Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago.

That recycling of Earth's surface leads to the separation of light - colored continental crust (exposed here at Yosemite National Park's Half Dome) from darker, denser oceanic crust.

Cycling of oceanic crust through mantle reservoirs can therefore explain observations of different recycled oceanic crustal ages and explain the chemical complexity of hotspot lavas.

There it will seek out new species and habitats; it may also study subduction zones, where oceanic crust is recycled back into the earth's mantle.