Plate tectonics is the theory that the outer rigid layer of the earth (the lithosphere) is divided into a couple of dozen plates that move around across the earth's surface relative to each other, like slabs of ice on a lake. The plate tectonics theory suggests that earth's crust is broken into many small pieces that move, and that the plate interactions result in earthquakes, mountain ranges, volcanoes and the separation of continents. As we discovered in chapter 1, plate tectonics is the model or theory that we use to understand how our planet works more specifically it is a model that explains the origins of continents and oceans, folded rocks and mountain ranges, igneous and metamorphic rocks, earthquakes and volcanoes, and continental drift. Continental drift was a theory that explained how continents shift position on earth's surface set forth in 1912 by alfred wegener, a geophysicist and meteorologist, continental drift also. Plate tectonics is the theory that the outer rigid layer of the earth (the lithosphere) is divided into about a dozen plates that move across the earth's surface relative to each other, like slabs of ice on a lake (click picture below for a larger version.
Plate tectonics definition, a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past adjacent plates see more. Continental drift, sea floor spreading and plate tectonics plate tectonics is a theory developed in the late 1960s, to explain how the outer layers of the earth move and deform. The theory of plate tectonics states that the earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
While once considered revolutionary, plate tectonics theory is now so solidly supported by evidence of many kinds that it is second nature for geologists to explain local histories in terms of such things as the collision of two plates or the movement of a continent from one climate zone to another. Continental drift and plate-tectonics theory source: us dept of the interior, geological survey according to the theory of continental drift , the world was made up of a single continent through most of geologic time. Plate tectonics explained minuteearth loading unsubscribe from minuteearth plate tectonics theory lesson - duration: 8:51 cary graham 362,114 views 8:51. One of the most important contributions to the development of plate tectonic theory was alfred wegener's 1915 publication of 'the origin of continents and oceans' which outlined his theory of continental drift wegener supported his argument with five lines of evidence. Theory of plate tectonics was established by alfred wegener fossils and mountain ranges were his evidences alfred wegener created the idea of continental drift and wrote 'the origin of continents and oceans' to support his idea.
The ‘plate tectonics: the dan mckenzie archive’ website will appeal to a broad audience from the layperson interested in geology to the professional passionate about the development of science and scientific ideas. The theory of plate tectonics is based on several assumptions, the most important of which are: new plate material is generated at ocean ridges, or constructive plate boundaries , by sea-floor spreading. The theory of plate tectonics explains the relative movement of crustal plates that are juxtaposed with each other to form an interlocking pattern of plate boundaries, oceanic trenches, mountain ranges, etc.
The sea floor spread the earth's longest mountain chain isn't the andes in south america, or the himalayas in asia, or even north america's rockies. Plate tectonics theory, formerly known as the theory of continental drift, is well supported in geology, geography and biology it has the power to explain many phenomena, such as volcanoes and earthquakes. Driving forces of plate motion edit file:global plate motion 2008-04-17jpg plate tectonics is basically a kinematic phenomenon scientists agree on the observation and deduction that the plates have moved with respect to one another but continue to debate as to how and when. Plate tectonics is a theory which says that the earth’s surface is made up of moving parts we call these parts ‘tectonic plates,’ or plates for short plates move for many reasons but, convergent boundaries are central to their movement as plates drift around, they run into each other a lot. In geologic terms, a plate is a large, rigid slab of solid rock the word tectonics comes from the greek root to build putting these two words together, we get the term plate tectonics, which refers to how the earth's surface is built of plates the theory of plate tectonics states that the earth's outermost layer is fragmented into a dozen or more large and small plates that are moving.
Plate tectonics is the unifying theory of geology, said nicholas van der elst, a seismologist at columbia university's lamont-doherty earth observatory in palisades, new york. A new study suggests that plate tectonics—a scientific theory that divides the earth into large chunks of crust that move slowly over hot viscous mantle rock—could have been active from the. The theory of plate tectonics links earth’s internal processes to the distribution of continents and oceans it is the big picture view of how the earth works plate tectonics reveals that the lithosphere is divided into eight major pieces (plates) with several smaller plates (fig 2. Plate tectonics is the theory that explains the global distribution of geological phenomena principally it refers to the movement and interaction of the earth's lithosphere this includes the formation, movement, collision and destruction of plates and the resulting geological events such as seismicity, volcanism, continental drift, and.
Plate tectonics: the rocky history of an idea close examination of a globe often results in the observation that most of the continents seem to fit together like a puzzle: the west african coastline seems to snuggle nicely into the east coast of south america and the caribbean sea and a similar fit appears across the pacific. Plate tectonics is an important geologic concept as it fills in the gaps to earth's geologic history the theory of plate tectonics helps explain the formation of mountain ranges, volcanism, earthquakes and the features associated with active plate boundaries. Plate tectonics is the scientific theory that attempts to explain the movements of the earth's lithosphere that have formed the landscape features we see across the globe today by definition, the word plate in geologic terms means a large slab of solid rock tectonics is a part of the greek.