Intrusive igneous rocks, also known as plutonic rocks, are formed inside earth's crust. Molten rock rises and fills openings or melts overlaying rocks. This eventually hardens creating an intrusive igneous rock. An extrusive igneous rock, or volcanic rock, is created by magma rising the earth's surface. Magma is known as lava when it reaches the surface.
Geology and Lithology of la Sierra de Guadarrama What is Geology and Lithology? Geology is the science that studies the origin and formation of the earth and the materials that compose them and Lithology is the science that studies of the rocks in an environment. Types and Characteristics of the Rocks: There are lots of types of rocks that the geologists studies, in Sierra de Guadarrama there are some type of rocks like: plutonics, metamorphics, sedimentaries and dykes rocks. Also the most antique rocks are the gneiss, marble and schist (Those are Metamorphic Rocks). Plutonics Rocks: Plutonics rocks are igneous rocks that had been melt at a deep distance.
The Formation of Fold Mountains at Destructive Plate Boundaries: * At a destructive plate boundary the oceanic plate is subducted beneath the continental one. The molten material then rises to the surface to form volcanoes, either in an island arc (e.g. the West Indies) or on the continental land mass (e.g. the volcanoes of the Andes). In both cases Fold Mountains can be formed.
Sheuk-Yeeng Tan Explain the causes of tectonic plate movement and how the processes of folding, faulting and volcanism have shaped New Zealand landforms The cause of the tectonic plate movement is when the plates 'float' on the molten rock magma and as the core of the Earth heats up the materials inside, the molten magma also gets heated up. The heat causes convection currents (a movement of rising and sinking caused by heat, inside the molten magma). The magma will rise and spread out across the surface, then cools and sinks, dragging along the plates 'attached' to it at intervals, causing Plate Tectonics. A fold is the process of tectonic plates folding to create mountains and hills and terrains. It is caused by two or more tectonic plates pushing against each other and causing folds, like pushing two ends of a piece of paper together.
Earthquake shaking and damage is the result of three basic types of elastic waves. Two of the three propagate within a body of rock. The faster of these body waves is called the primary or P wave. Its motion is the same as that of a sound wave in that, as it spreads out, it alternately pushes (compresses) and pulls (dilates) the rock. These P waves are able to travel through both solid rock, such as granite mountains, and liquid material, such as volcanic magma or the water of the oceans.
This is founded on dissimilarities in mechanical properties and in the procedure for the transfer of heat. Theoretically, the lithosphere is cooler and harder, while the Asthenosphere is hotter and flows more easily. The key principle of tectonic movement is that the lithosphere exists as separate and distinct tectonic plates, which ride on the fluid-like Asthenosphere. The geological position where two plates rendezvous is called a plate boundary. Plate boundaries are routinely affiliated with geological events such as earthquakes and are responsible for geological enrichment by conceiving topographic characteristics such as hills, volcanoes, mid-ocean ridges, and oceanic trenches.
In volcanic regions of the earth, the hot rock is relatively close to the surface. Also in such regions sometimes, the natural groundwater comes in contact with the hot rock and the heated water or steam may find its way to the surface through natural steam vents. In such regions, holes can be drilled into the hot rock groundwater structure and make the rising steam to drive turbo generators to produce electric power. Uses: We utilise this type of heat for power generation. For developing countries, the overall' projected potential was estimated at 400x1018 joule for geothermal energy with the projected capacity in 1990.
A volcano is a vent in the crust of the Earth from which molten or hot rock and has explosively violent potential. Volcanoes are important to us because they create new land. The land around a volcano is very fertile and has important and valuable minerals in the soil. Also, their geothermal power can be converted into an alternative energy source. This paper will be about Mount St. Helens.
The release of heat from Earth's interior creates huge convection cells, which are at least partly responsible for driving plate motion. Convection brings hot rock up from deep in the mantle and recycles cold rock back into the mantle. Many unanswered questions
Basaltic oceanic plates are made from denser rock, than granitic continetal plates. ------------------------------------------------- The Plate Tectonic Theory * The earth's crust is divided into separate parts called tectonic plates. * These plates float on the partially molten rocks of the upper mantle. * The plates move due to convection cells in the mantle. * Margins are the areas between the tectonic plates.