Sedimentory Rock

Rock sediment or sedimentary rock is one of the three main rock groups (along with igneous and metamorphosed rocks) are formed through three main ways: weathering of other rocks (clastic); deposition (deposition) due to biogenic activity; and precipitation (precipitation) of solution. Common rock types such as limestone, sandstone, and clay, including the rock sediment. Sediment rocks covering 75% of the earth's surface.
Naming sediment grain size is usually based on the naming of the rock composer is: breccia, conglomerate, sandstone, clay stone

* Breccia is a sedimentary rock with grain size larger than 2 mm with an angular shape butitan
* Conglomerate is a sedimentary rock with grain size larger than 2 mm in the form of granules which membudar
* Sandstone is a sedimentary rock with grain size between 2 mm to 1 / 16 mm
* Stone silt is sedimentary rock with grain size between 1 / 16 mm to 1 / 256 mm
* Stone clay is a sedimentary rock with grain size smaller than 1 / 256 mm

Igneous Rock

Igneous rock or igneus (from the Latin ignis, "fire") is a type of rock formed from magma that cools and hardens, with or without crystallization, either below the surface as intrusive rocks (plutonic) or above the surface as a rock extrusive (volcanic). This magma can be derived from a half-molten rock or rock that already exist, either in the mantle or crust of the earth. Generally, the melting process occurs by one of the following processes: the increase of temperature, pressure drop, or change in composition. More than 700 types of igneous rocks has been described, largely formed beneath the surface of the earth's crust.

Tectonic Plate

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]

What is geology

Geology (from Greek: γη-[ge-, "earth"] and λογος [logos, "word", "reason"]) is a science (science that studies the earth, its composition, structure, physical properties, history, and formation processes.Geologist has been helpful in determining the age of the earth which is estimated around 4.5 billion (4.5x109) years, and has determined that the Earth's crust is fragmented into tectonic plates move on the half-molten mantle (astenosfir) through a process called plate tectonics. Geologist helped find and manage existing natural resources on earth, such as petroleum, coal, and also metals such as iron, copper, and uranium and other minerals have economic value, such as asbestos, perlite, mica, phosphates, zeolites, soil clay, pumice, quartz, and silica, and also other elements such as sulfur, chlorine, and helium.Astrogeologi is the application of geological knowledge about other planets in the solar system (solar system). However, other specific terms such as selenology (the lesson of the month), areologi (lesson about the planet Mars), etc., are also used.The word "geology" was first used by Jean-André Deluc in the year 1778 and introduced as the standard term by Horace-Benedict de Saussure in the year 1779.