Sentences with phrase «oceanic plates»

The findings might apply to other oceanic plates as well.

Sediments from the Triassic in the deeper ocean have been mainly subsumed by subduction of oceanic plates, leaving but a sparse marine fossil record.

Since, if I remember correctly, subduction generally occurs when a dense oceanic plate dives under a less dense continental plate, you'd have to get the waste to the seafloor and then bury it there in such a way that it wouldn't leak into the water before it sank deep enough into the Earth to be safely forgotten about.

When oceanic plates form at mid-ocean ridges, their movement away from the ridge causes olivine (the most abundant mineral in the Earth's interior) to align with the direction of plate growth.

Beghein and her research team advanced our understanding of how oceanic plates form and evolve as they age by using and comparing two sets of seismic data; the study revealed the presence of a compositional boundary inside the plate that appears to be linked to the formation of the plate itself.

In a subduction zone, a heavy oceanic plate meets a second, lighter continental plate and moves under it and into the earth's mantle.

At certain subduction zones, such as those in Cascadia, Sumatra and eastern Alaska, a thick sediment layer overlies the subducting oceanic plate.

Off the Oregon and Washington coast, the Juan de Fuca oceanic plate is slowly moving under the North American plate.

The authors used the Colombian Seismic Network's database of more than 100,000 seismic events to identify the prominent tear, where the slab is broken along a very distinct break, separating the Nazca oceanic plate, which is coming from the Pacific, from the Panama plate, which is an old island arc (Sandra ridge) that pushes into Colombia from the west.

Three basic forces are believed to drive oceanic plate movement: plates are «pushed» away from mid-ocean ridges as new sea floor forms; plates are «pulled» as the oldest parts of the plate dive back into the earth at subduction zones; and convection within the asthenosphere helps ferry the plates along.

Jones and his colleagues propose the water came from the subducting Farallon oceanic plate under the Pacific Ocean 75 to 45 million years ago.

The tectonic plates of the oceans are being subducted under the continental plates, or under other oceanic plates.

Some recent studies reproduced key geophysical factors in a laboratory setting, including a rising plume and a sinking oceanic plate.

«Nevertheless, the Cascadia Initiative significantly contributes to a better understanding of the structure of the downgoing oceanic plates and thus to the assessment and mitigation of potential seismic and tsunamic hazards.»

The CO2 pools form when one oceanic plate buckles under another and carbonates in the sediment break down under the intense heat.

The complex regional tectonic activity includes movement of three plates: the Caribbean plate that is subducting or being forced beneath Colombia in the north; the Panama block or Panama plate that is colliding with Colombia in the central part of the country; and the Nazca plate, which is an oceanic plate that is subducting beneath the southern part of Colombia from the Pacific.

The study is part of the NoMelt project, which was designed to explore the lithosphere - asthenosphere boundary at the center of an oceanic plate, far from the influence of melting at the ridge.

Trapped and under great pressure and heat, the water was released from the oceanic plate and moved up through the mantle and toward the lower crust.

The team found that the subducting slab — a portion of the oceanic plate that slides beneath a continental plate — is the dominant driving force behind the deformation of the mantle.

The Sea of Okhotsk earthquake may have involved re-rupture of a fault in the plate produced when the oceanic plate bent down into the Kuril - Kamchatka subduction zone as it began to sink.

Now, a computer modeling approach, developed by University of Maryland seismologist Vedran Lekic and colleagues at the University of California Berkeley, has produced new seismic wave imagery which reveals that the rising plumes are, in fact, influenced by a pattern of finger - like structures carrying heat deep beneath Earth's oceanic plates.

The oceanic plates are shortening due to cooling, which causes relative motion inside the plate, Kreemer said.

The Galápagos Islands formed from a hotspot of magma located in an oceanic plate — called Nazca — about 600 miles of Ecuador, in a process very similar to how the Hawaiian Islands were created.

This olivine structure is then «frozen» into the oceanic plate as it travels across the Earth's surface.

A companion observatory for tsunamis The enormous tsunami that killed more than a hundred thousand people in Africa and southern Asia last December 26 was spawned by a subduction fault, formed when an oceanic plate dives beneath a continental plate.

In high - pressure and high - temperature X-ray measurements that were partly conducted at DESY, scientists created conditions similar to those in so - called subduction zones where an oceanic plate dives under the continental crust.

With the oceanic plate, water enters the earth as it is trapped in minerals of the oceanic crust or overlaying sediments.

To understand how water affects subduction of the oceanic plate, in which layers of different rock types sink into the mantle, the UO team studied hydrogen isotopes in water contained in tiny blobs of glass trapped in olivine crystals in basalt.

Older crust in turn is then forced back down into the Earth's mantle in places where a continental plate meets an oceanic plate.

a) The oceanic plate is subducting beneath the continental plate.

Continental volcanic arc systems such as the Andes Mountains are created at active continental margins where two tectonic plates meet and the oceanic plate descends under the continental plate, forming a subduction zone.

Most earthquakes in our region result directly or indirectly from the convergence of three tectonic plates: the continental North America plate with two oceanic plates, the Juan de Fuca and Gorda plates.

Washington, D.C. — Seawater circulation pumps hydrogen and boron into the oceanic plates that make up the seafloor, and some of this seawater remains trapped as the plates descend into the mantle at...

In this case, the quake was caused when a 620 - mile - long (1,000 kilometers) stretch of the Nazca plate, an oceanic plate that forms a large swath of the Pacific Ocean floor, lurched deeper beneath the South American plate, producing the only 9.5 - magnitude quake on record.

According to the theory of plate tectonics, the ascent of magma originating from the Earth's mantle is produced by the effects of tectonic activity from faults or fractures that exist at the oceanic plate.

The study is part of the NoMelt project, which was designed to explore the lithosphere - asthenosphere boundary at the center of an oceanic plate, far from the influence of melting at the ridge.

If we are to assume, in the absence of other emission figures for mid oceanic plate volcanoes, that Kilauea is a typical mid oceanic plate volcano with a typical mid oceanic emission of 870 KtCpa (Kerrick, 2001), then we might estimate a total submarine volcanogenic CO2 output of 121 GtCpa.