Metamorphic alteration causes the texture and mineral composition to change. Recrystallization is the process of the formation of a new texture. Metamorphic rocks are usually classified as either regional or thermal. Regional metamorphic rocks are mostly formed by pressure instead of heat. Different types of rocks are created based on the amount of pressure.
The point on the Earth's surface directly above the hypocenter is called the epicenter of the earthquake. The closer you are to the epicenter of the earthquake, the more dangerous and devastating. The severity of an earthquake can be expressed in terms of both intensity and magnitude. Although the two terms are very different, they are often confused with each other. Intensity is based on the observed effects taken place during the earthquake, for instance the ground shaking underneath people, buildings, and natural features.
Howard University Washington, D.C. Department of Mechanical Engineering “Strain Hardening “ Lab 2 By Theron Lewis For Professor H.A. Whitworth October 3rd, 2011 Table of Contents ABSTRACT Work hardening (or strain hardening) is the strengthening of a metal by plastic deformation. This phenomenon occurs because of the altering of the material’s crystal structure through dislocation movements. Work hardening is used extensively in metalworking, where one intentionally induces plastic deformation to increase strength and change its shape. These processes are also known as cold working.
Earthquakes are caused by the rift and abrupt movement of two rocks that suddenly slip past one another. Earthquakes occur along faults which are fractures in the lithosphere where sections of rock move past one another. There are three important parts to an earthquake: the focus, the epicenter, and seismic waves. The focus is the point on the fault where the separation occurs and from where the seismic waves are formed. The epicenter is located directly above the focus on the earth’s surface.
A hazard is a natural event that has the potential to effect both life and property. When looking at earthquakes there is one primary hazard which occurs and this is the shaking of the ground. In addition there are many secondary hazards such as landslides, fires, avalanches, liquefaction and tsunamis. There are many human factors to be discussed such as preparedness, development level, land use and education and many other contradicting factors such as the tectonic setting and the time of year. To show the view that the impact of earthquake hazards depends primarily on human factors, I will situate the essay around some seismic events that have previously occurred; Haiti in the Caribbean, 2010, Christchurch in New Zealand, 2011, Sichuan in China, 2008 and Indian Ocean, 2004.
Higher than low force waterfall, the word force is used because it is a Viking word that means waterfall when translated. The waterfall is a cascading waterfall meaning that it goes down in steps. The reason it is a cascading waterfall is because that the less resistant rock is built in steps and each time the step is carved in too much then the more resistant rock on top has not enough support and breaks causing a mini waterfall inside the actual waterfall and making a series of drops. The geology of the waterfall at Tees has a tough or resistant rock which is an igneous rock called whin sill. This rock supports the waterfall until enough less resistant rock is carved away then this falls into the river below and might cause hydraulic action.
This makes the rock grow hard, and get a pronounced cleavage direction, so that it breaks along flat planes. The foliation property of Slate is caused by the parallel orientation of platy minerals in the rock such as microscopic grains of clay minerals and mica. This beautiful rock comes in a variation of colors often determined by the amount and type of iron and organic material that are present in the rock. Most slates are gray in color and range from light to dark gray, it also occurs in shades of green, red, black, purple, and brown. The variety of Slate colors and its ruff texture makes it an ideal material for interior decoration.
It increased by 7 ft a day.” Earthquakes You can predict when a volcano will erupt because you get earthquakes. This is because most volcanoes follow a regular pattern of increasing seismic activity as the eruption is about to take place, usually in the form of small earthquakes. Scientist use special equipment seismometers that tell and record earthquakes that happen underneath the volcano. Long period earthquakes- are beneath volcanoes and are believed that it is caused by magma moving through cracks that then shake the ground. Short period earthquakes- earthquakes under the volcanoes that is believed to be caused by rock breaking events Both types of
Gas or its inability to escape is what causes volcanos to become violent. The longer gas is trapped, the more pressure builds up. The cause of gas building up is the result of the viscosity of the magma the gas is trapped in. Viscosity is the measure of the flow or how easily a liquid flows. If a liquid is viscous it is thick and will flow slowly like honey whereas a liquid that is nonviscous will flow like water.
Each boundary between 2 plates have the capability of being a different type of boundary. The 3 types of boundaries are destructive (plate being destroy as another passes over the top), constructive plates moving apart from each other creating new crust) and conservative (sliding past one another). Each boundary will have its own key characteristics. Firstly, we will look at destructive plate boundaries. These are boundaries where the plats move towards each other but 1 plate travels underneath (subduction).