plate tectonics: Media

geology

Videos

What is the theory of continental drift?
Learn more about the theory of continental drift.
Video: Encyclopædia Britannica, Inc.
The types of seismic waves explained
The shifting rock in an earthquake causes vibrations called seismic waves that travel...
Video: Encyclopædia Britannica, Inc.
How does plate tectonics change Earth's surface?
A general discussion of plate tectonics.
Video: Encyclopædia Britannica, Inc.
How Marie Tharp mapped the ocean floor
Marie Tharp was an American geologist and oceanographer famous for helping to create...
Video: Encyclopædia Britannica, Inc.
Piecing together the puzzle of continental drift
A discussion of some of the evidence supporting continental drift on Earth.
Video: Encyclopædia Britannica, Inc.
Watch Earth's continents move, from 650 million years ago to 250 million years in the future
A time-lapse representation of Earth changing through geologic time, from the late...
Video: Adapted from C.R. Scotese, The University of Texas at Arlington
Hear researcher Andy Wheeler speaking about an expedition to discover new hydrothermal vent field in the middle of the Atlantic Ocean
An expedition seeking hydrothermal vents in the middle of the Atlantic Ocean.
Video: University College Cork, Ireland (A Britannica Publishing Partner)
What is continental drift and how does it work?
The land on Earth is constantly moving. Over millions of years, the continents broke...
Video: Encyclopædia Britannica, Inc.
Study how the convection currents and other forces play a role in the movement of Earth's tectonic plates
The roles that convection currents and other forces play in the movement of Earth's...
Video: © MinuteEarth (A Britannica Publishing Partner)
Understanding earthquakes: The role of Earth's crustal plates
John P. Rafferty, biological and earth science editor of Encyclopædia Britannica,...
Video: Encyclopædia Britannica, Inc.
How and where does magma form on Earth?
At the margins of Earth's plates, where two plates pull apart or one plate dives...
Video: Encyclopædia Britannica, Inc.

Images

Earth's tectonic plates
Map showing Earth's major tectonic plates with arrows depicting the directions of...
Encyclopædia Britannica, Inc.
Earth's lithosphere and upper mantle
A cross section of Earth's outer layers, from the crust through the lower mantle.
Encyclopædia Britannica, Inc.
crustal generation and destruction
Three-dimensional diagram showing crustal generation and destruction according to...
Encyclopædia Britannica, Inc.
Earth's core
The internal layers of Earth's core, including its two inner cores.
Encyclopædia Britannica, Inc.
plate movement
Theoretical diagram showing the effects of an advancing tectonic plate on other adjacent,...
Encyclopædia Britannica, Inc.
rift valley in Thingvellir National Park
The Thingvellir fracture zone at Thingvellir National Park in southwestern Iceland...
© Ihervas/Shutterstock.com
age of Earth's oceanic crust
The age of Earth's oceanic crust can be presented to show the pattern of seafloor...
Encyclopædia Britannica, Inc.
major types of volcanic eruptions
Volcanic eruptions may fall into six major types: Icelandic, Hawaiian, Strombolian,...
Encyclopædia Britannica, Inc.
subducting tectonic plate
A subducting plate's path (called the Benioff-Wadati [or Wadati-Benioff] zone) is...
Encyclopædia Britannica, Inc.
back-arc basin
The trench “roll back” process of back-arc basin formation.
Encyclopædia Britannica, Inc.
sea anchor process in back-arc basin formation
The slab “sea anchor” process of back-arc basin formation.
Encyclopædia Britannica, Inc.
Jurassic paleogeography
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins...
Adapted from: C.R. Scotese, The University of Texas at Arlington
continental margin
The broad, gentle pitch of the continental shelf gives way to the relatively steep...
Encyclopædia Britannica, Inc.
San Andreas Fault
At the San Andreas Fault in California, the North American Plate and the Pacific...
U.S. Geological Survey
Earth's principal tectonic plates
The principal tectonic plates that make up Earth's lithosphere. Also located are...
Encyclopædia Britannica, Inc.
earthquake zones and volcanoes
The world's earthquake zones occur in red bands and largely coincide with the boundaries...
Encyclopædia Britannica, Inc.
atoll formation
Diagram depicting the process of atoll formation. Atolls are formed from the remnant...
Encyclopædia Britannica, Inc.
plate movement on a sphere
Theoretical depiction of the movement of tectonic plates across Earth's surface....
Encyclopædia Britannica, Inc.
Leonhard Euler
Leonhard Euler, c. 1740s. Euler was a Swiss mathematician and physicist known for...
Kean Collection/Hulton Archive/Getty Images
evidence of continental drift
Among the first clues scientists discovered that supported the notions of continental...
C. Amante and B.W. Eakins (NOAA/NESDIS/NGDC)
paleocontinent
Infographic showing evidence of submerged continents that formed and broke up during...
Encyclopædia Britannica, Inc./Kenny Chmielewski
Alfred Wegener
Alfred Wegener, German geophysicist and meteorologist.
© Photos.com/Getty Images
continental drift
The location of Earth's continents at various times between 225 million years ago...
Encyclopædia Britannica, Inc.
continental drift
In this map depicting a portion of Gondwana (an ancient supercontinent that once...
Encyclopædia Britannica, Inc.
seafloor spreading in three ocean basins
Patterns of seafloor spreading in the Pacific (left), Arctic (centre), and Atlantic...
U.S. Dept. of Commerce/NOAA
seafloor spreading
Map showing the age of selected regions of the ocean floor. Chronological measurements...
Encyclopædia Britannica, Inc.
seafloor spreading and magnetic striping
Rising magma assumes the polarity of Earth's geomagnetic field before it solidifies...
Encyclopædia Britannica, Inc.
slab pull process
The weight of the subducted slab may drag the rest of the tectonic plate toward the...
Encyclopædia Britannica, Inc.
tomography
A three-dimensional slice of the geology of western Washington imaged with seismic...
USGS
vent tube worms (Riftia pachyptila)
Exotic biological communities exist near deep-sea vents; these ecosystems...
Photo courtesy of Dr. Monika Bright, Department of Marine Biology, University of Vienna, Austria
opossum
Nocturnal animals, such as opossums, have eyes with large, nearly spherical lenses.
© Geoffrey Kuchera/Dreamstime.com
volcanism and plate tectonics
Stratovolcanoes tend to form at subduction zones, or convergent plate margins, where...
Encyclopædia Britannica, Inc.