Teory Tectonic Plate (English: Plate Tectonics) is a theory in the field geologilitosfer earth. This theory has been included and also replaces the theory of continental drift first proposed in the first half of the 20th century and concepts of seafloor spreading developed in the 1960s. developed to provide an explanation for the existence of evidence of large-scale movement by Outermost part of Earth's interior is formed from two layers. At the top there is litosferkerak and the top of the mantle is rigid and solid. Under layers of the lithosphere asthenosphere which there is solid but can flow like a liquid with a very slow and in a geological time scale is very long because of viscosity and shear strength (shear strength) is low. Moreover, the mantle below the asthenosphere is more rigid in character to another. The cause is not a colder temperature, but high pressure. consisting of Lithospheric layer is divided into tectonic plates (tectonic plates). On earth, there are seven major plates and many of the plates which is smaller. This lithospheric plates ride on the asthenosphere. They are moving relative to each other at plate boundaries, both divergent (away), convergent (collide), or transformGempa earth, volcanic activity, mountain formation, and oceanic trench formation generally occur in areas all along the plate boundary. Lateral movement of plate speed is typically 50-100 mm / a. (Sideways). Growth Theory
In the late 19th century and early 20th centuries, geologists assumed that the appearance of the main feature of the earth-based equipment. Most geologic features such as mountains can be explained by vertical crustal movement, as explained in the theory geosinklin. Starting in 1596, has been observed that the Atlantic coast of the face-to-face between the continents of Africa and Europe with North America and South America have similar shapes and seem to never become one. This accuracy will be more obvious if we look at the edges of the continental shelf there. [2] Since then many theories have been advanced for explaining this, but all were at a stalemate because of the assumption that the earth is completely solid trouble finding an appropriate explanation. [3]
