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Principally it refers to the movement and interaction of the earth's lithosphere. A cross section of the earth reveals a crust with a complex pattern of interlocked and interactive plates. These plates derive their name from the Conservative plate margins continental or oceanic environment that they underlay.
These plates make up the earth's crust. In total there are seven major plates and a further six large regional plates. In reality, there are many other complex fault zones and micro-plate boundaries that are active and as a result produce geological events.
Below the crust is kilometers of mantle. Finally, deeper within the Earth's structure is the core which is distinguished by two distinct sections; a liquid outer core and a solid crystal inner core.
The Crust The crust is the outermost layer of the earth.
It is composed of a mixture of silicate-rich igneous rocks. In addition there are some metamorphic and sedimentary rocks. Oceanic crust is thinner in comparison to continental crust about 8 kilometers thick compared to kilometers and forms at divergent boundaries constructive.
Locally, the crust is metamorphosed by high-temperature fluids. Because ocean crust forms at ocean ridges and is normally subducted within a few hundred million years, the earth's oceans contain no oceanic crust older than Ma. Continental crust is a mixture of igneous, metamorphic, and sedimentary rocks that is highly variable in age and composition.
It extends from the base of the crust to the outer core and is approximately kilometers in depth. The mantle consists of igneous low-silicate content rock, rich in iron and magnesium. The chemical composition of the mantle remains relatively constant throughout, but it is so thick that it is subjected to a wide range of temperature and pressure.
These differences have helped establish a classification within the mantle.
In general terms we can distinguish the upper and the lower mantle. As depth increases, the physical properties of the mantle change, and so does its behavior. It goes from rigid in the uppermost mantle down to km to plastic and partially molten only a very small percentage is actually molten in the upper part of the lower mantle and back to being fairly rigid but still plastic in the lower mantle.
Two further zones should be stated. The very upper section of the mantle is known as the lithosphere but this also includes the crust.
Below the lithosphere and extenidng to the margin of the lower mantle is the asthenosphere. UCL The core is primarily a mixture of iron and nickel metals, with a little sulfur. The inner core is a crystalline solid with this composition, whereas the outer core is a liquid. The core is approximately kilometers in depth.Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός "pertaining to building") is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, since tectonic processes began on Earth between 3 and billion years metin2sell.com model builds on the concept of continental.
Lithospheric plates: forces acting at plate margins. Other forces that act on plates must be generated at their boundaries. These forces push from the ridge, drag the plates down at the trenches, or act along the sides of plates at conservative boundaries (Figure 28).
How do Conservative Plate Margins Occure? When two plates move parallel to each other, either in different directions, or one plate moving by faster than another.
Which of these is an example of a Conservative Plate Margin? Purpose: In the musculoskeletal system, structure dictates function and the development of pathology. Interpreting wrist structure is complicated not only by the existence of multiple joints and ligamentous structures but also by variability in bone shapes and anatomical patterns.
An online resource from the Geological Society, outlining the three types of plate boundary and the activity that characterises them. Plate tectonics: Plate tectonics, theory dealing with the dynamics of Earth’s outer shell that revolutionized Earth sciences by providing a uniform context for understanding mountain-building processes, volcanoes, and earthquakes as well as the evolution of Earth’s surface and reconstructing its past continents and oceans.