Plate Tectonics
Earth is an ever-changing planet. Volcanoes and
earthquakes continually reshape the continents and seafloor. Mountains
rise, then are worn down.
In the 1960s, scientists presented a theory that
explains Earth's dynamics, from the occurence of earthquakes to
the building of the Mid-Ocean Ridge. Explore
the theory »
Related Hot Topics
Seafloor
Gravity
From Expedition 2: Learn about what gravity is
and why using a gravimeter in Alvin can help geophysicists learn
about the ocean crust. Learn
about seafloor gravity »
Seafloor
Magnetics
From Expedition 2: Learn about the Earths magnetic field and why measuring
it near the seafloor can help geophysicists understand how the ocean crust
forms. Learn
about magnetics »
Hotspots
and Cool Volcanoes: The New England Seamounts
From Expedition 7: If you
drained the water from the ocean basins, some of the most dramatic
features you would see are groups or lines of underwater volcanoes
called "seamounts",
sometimes in clusters and other times stretching across the ocean basin for many
miles. Learn
more »
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