Plate Tectonics and Deep Earth
Plate Tectonics in a Nutshell
A tree of branching pages takes you through this great unifying theory. For more, see the Plate Tectonics category.
A tree of branching pages takes you through this great unifying theory. For more, see the Plate Tectonics category.
Geo-Quiz 16: Plate Tectonics
See if you can answer these 12 questions on plate tectonics. Caution: this has been known to stump professors.
See if you can answer these 12 questions on plate tectonics. Caution: this has been known to stump professors.
About the Mantle
Introducing the thick rock shell between the crust and core that makes up the bulk of the Earth. For more, see the Earth's Mantle category.
Introducing the thick rock shell between the crust and core that makes up the bulk of the Earth. For more, see the Earth's Mantle category.
About the Earth's Core
How we study the Earth's core and what it's made of.
How we study the Earth's core and what it's made of.
Powering the Planet
A hundred years ago the secret of Earth's eternal youth was discovered: radioactive heating.
A hundred years ago the secret of Earth's eternal youth was discovered: radioactive heating.
High-Precision Gravimetry
How we study Earth motions and changes with fantastically accurate gravity meters.
How we study Earth motions and changes with fantastically accurate gravity meters.
Rhenium-Osmium Studies
Two rare metals yield deep geologic clues.
Two rare metals yield deep geologic clues.
Earth Rotation Studies
Why every day is a little different by a few milliseconds—part of the "Earth Science in Space" series.
Why every day is a little different by a few milliseconds—part of the "Earth Science in Space" series.
True Polar Wander
A crazy idea resurfaces to knock Earth--and geology--upside the head.
A crazy idea resurfaces to knock Earth--and geology--upside the head.
Inside the Earth
The layers of the planet shown and labeled, suitable for homework, from the U.S. Geological Survey.
The layers of the planet shown and labeled, suitable for homework, from the U.S. Geological Survey.
"Some Like It Hot"
A technical introduction to the Earth's temperature structure from the American Geophysical Union.
A technical introduction to the Earth's temperature structure from the American Geophysical Union.
World Stress Maps
Maps for each continent from the University of Karlsrühe, Germany.
Maps for each continent from the University of Karlsrühe, Germany.