Earth's Interior

Earth's interior is made up of a series of layers that sit below the surface crust. In order of depth, these layers include the solid, but flowing mantle, the liquid outer core and the solid iron outer core, which helps create Earth's protective magnetic field. The layers can also be categorized into the rigid outer lithosphere (which includes the crust and top portion of the mantle and makes up Earth's tectonic plates) and the athenosphere, the portion of the mantle that is solid, but made up of hot, weak, flowing rock. Read about the latest research on Earth's layers below.
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Latest Articles

Early Earth's Crust Was a Drippy, Hot Mess
The processes of the Earth's mantle
January 7th, 2014
Chunks of the thick crust that covered the early Earth may have dripped down into the mantle layer below, shedding light on how the Earth's interior behaved early in Earth's history.
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Magma Ocean Could Have Given Early Earth Magnetic Field
The Earth's magnetic field, magnetic poles and geographic poles.
December 6th, 2013
Earth may have had a protective magnetic field earlier than previously thought, generated not by its liquid outer core as happens today, but by a magma ocean sitting above the core, a new study suggests.
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Rare Diamond Reveals Earth's Interior is All Wet
ringwoodite diamond
March 12th, 2014
A battered diamond that survived a trip from "hell" confirms a long-held theory: Earth's mantle holds an ocean's worth of water.
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Sparkling Discovery: Antarctica May Contain Diamonds
Diamonds
December 18th, 2013
A type of rock that often contains diamonds has been found in Antarctica — suggesting the shiny gems could also be found there — but diamond mining in the southernmost continent is impractical.
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Deadly New Zealand Earthquakes Weakened Earth's Crust
November 25th, 2013
The earthquakes that struck New Zealand's South Island in 2010 and 2011, the second of which killed scores of people, weakened the crust around the ruptured fault.
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Why Earth's Inner and Outer Cores Rotate in Opposite Directions
Earth's layers
September 19th, 2013
The Earth's magnetic field is responsible for the rotation of both the inner and outer cores, new research suggests.
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Tiny Crystal Defects Help Drive Plate Tectonics
Olivine deformation
February 27th, 2014
Researchers recently discovered a new crystal defect in olivine that helps explain how the mantle drives plate tectonics.
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Floating Seismic Devices Peer Deep Beneath Ocean Floor
A mermaid sensor is launched in the Indian Ocean
December 10th, 2013
Floating seismic stations that can dive more than a mile beneath the ocean's surface could help reveal the processes that govern deep Earthquakes and other mysterious processes in the planet's mantle.
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Weak Iron Explains Earth's Inner Core Speed Trap
Earth's layers
October 11th, 2013
A new computer model of Earth's inner core suggests a seismic-wave slowdown comes from changes in iron's strength just before the metal melts.
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