plate tectonics


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

plate tectonics

n.
1. (used with a sing. verb) A theory that explains the global distribution of geological phenomena such as seismicity, volcanism, continental drift, and mountain building in terms of the formation, destruction, movement, and interaction of the earth's lithospheric plates.
2. (used with a sing. or pl. verb) The dynamics of plate movement.

plate′-tec·ton′ic adj.

plate tectonics

n
(Geological Science) (functioning as singular) geology the study of the structure of the earth's crust and mantle with reference to the theory that the earth's lithosphere is divided into large rigid blocks (plates) that are floating on semifluid rock and are thus able to interact with each other at their boundaries, and to the associated theories of continental drift and seafloor spreading

plate′ tecton′ics


n.
a geologic theory that describes the earth's crust as divided into a number of rigid plates, movement of which accounts for such phenomena as continental drift and the distribution of earthquakes.
[1965–70]
plate′-tecton′ic, adj.

plate tectonics

In geology, a theory that the Earth's lithosphere (crust and upper mantle) is divided into a number of large, plate-like sections that move as distinct masses. See Notes at fault, Gondwanaland, See more at tectonic boundary.
Did You Know? Have you ever noticed that the Earth's continents seem to fit together like pieces of a puzzle? This observation is what led the German meteorologist Alfred Wegener to propose the theory of continental drift in 1915. Since rocks and fossils were found to match up in parts of different continents, it seemed that they must have once been joined, but no one could explain how such large landmasses could move so far apart. This problem was not solved until the 1960s, when the theory of plate tectonics was proposed. According to this theory, the continents move apart by riding piggyback on plates—huge slabs of the Earth's lithosphere—that are much larger than the continents themselves. The plates move like parts of a conveyor belt powered by huge convection currents of molten rock that many geologists believe is heated by the decay of radioactive elements deep within the Earth. Although they only move a few inches per year, over hundreds of millions of years the continents are carried thousands of miles. Along their boundaries, the plates crumple, scrape, or pull apart from one another, giving rise to volcanoes and earthquakes and creating and destroying rock on the ever-changing surface of the planet.

plate tectonics


click for a larger image
The study of how lithospheric plates move around.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plate tectonics - the branch of geology studying the folding and faulting of the earth's crust
geomorphology, morphology - the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms
Pangaea, Pangea - (plate tectonics) a hypothetical continent including all the landmass of the earth prior to the Triassic period when it split into Laurasia and Gondwanaland
References in periodicals archive ?
Plate tectonics may not rumple the surfaces of Earth's supersized cousins.
The pair reported a previously unknown geochemical pathway by which the Earth can sequester water in its interior for billions of years and still release small amounts to the surface via plate tectonics, feeding our oceans from within.
The Incredible Plate Tectonics Comic, The Adventures of Geo, Vol.
On Earth, mountains rise out of volcanic eruptions or are pushed upward by plate tectonics, the collision of pieces of the planet's crust.
Objective: The Plate Tectonics Theory is the most important discovery in all of earth sciences.
Geologists have a new explanation for the origin of plate tectonics.
8, 2014 /PRNewswire-USNewswire/ -- Scientists have found evidence of plate tectonics on Jupiter's moon Europa.
But instead of a system of plate tectonics, scientists said that it is more likely Earth worked like Io - with huge volcanic pipes flowing super hot material up to the surface.
To compare Japan with Britain is ridiculous and reveals a complete ignorance of plate tectonics.
His main focus is on the evolution of sedimentary basins from sedimentary facies to plate tectonics.
On the Earth, the continents effectively float (a bit like the skin on hot milk) on a mobile lower layer - this we call plate tectonics and it leads to the formation of ranges of mountains, when the island continents collide, and volcanoes.
Check out geological phenomena such as plate tectonics, volcanoes, earthquakes and tsunamis in an interactive process known as prototyping.