is associated with two of the plate boundary types: divergent and convergent margins‚ so activity is usually found along oceanic ridges where plates are moving apart‚ near rift valleys‚ on subduction zones where the most violent activity takes place and over hot spots which have given rise to the Hawaiian islands. Magma is generated at most plate boundaries‚ and this magma rises to the surface to form volcanoes. The mobility of crust also causes earthquakes. When plates collide or slide past each other
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Chapter 4 plate tectonics Need a Hint? 1.What evidence proved that South America‚ Africa‚ India‚ and Australia were once covered by glaciers? glacial deposits and rock surfaces scarred by glaciers 2. What happens when an oceanic plate converges with a continental plate? The denser oceanic plate slides under the less dense continental plate. 3. A divergent boundary is a boundary between two plates that __________. Move away from each other. 4.Do two colliding continental plates always
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An Introduction to Structural Geology Introduction Structural geology is the study of the features formed by geological processes. Features include faults‚ folds and dipping strata. Geologists can work out the order of events and see which events are related by taking fairly simple measurements and using simple methods. Measurements and Techniques The most obvious thing to do when trying to decipher the structural history of a formation is to describe it. One way of doing this is to measure the dip and strike
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place to visit. The spectacular island is the second largest in Europe and located between the Greenland Sea and the Atlantic Ocean. It sits on a constructive plate boundary; the violent tug of war between the two plates causes Iceland to gradually get bigger. Iceland is the most volcanically active place in the world‚ due to tectonic plate activity. Disruptive eruptions occur about every five years. The most recent eruption of Eyjafjallajokull in April 2010‚ caused havoc both internationally and
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For millions of years people have lived in areas where two different plates meet. In theses types of areas it is very common for earthquakes to happen and for volcanoes to form. So why if these are such dangerous places to live do people continue to settle here? One reason may be that people believe that the types of natural disasters that are possible will never affect them in their lifetime. It is impossible to tell when a plate movement will occur. Some people are willing to take the chance that
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Haiti Earthquake The last major earthquake to hit Haiti prior to the 2010 was in 1984. On the 12th of January 2010 the small Caribbean country of Haiti was hit by a catastrophic earthquake of 7.0 magnitude. The earthquake struck on the afternoon of the 12th of January at 4:57pm and hit south-west of the Haitian capital of Port-au-Prince killing 316‚000 and affecting millions of residents. 1.5 million people were displaced and approximately 250‚000 residences and 30‚000 commercial buildings were
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Identification and Starter Culture Activity of Lactoccocus lactis MATERIAL & METHODS MATERIAL: Apparatus: 1. Capped test tubes 2. Test tubes holder stand 3. Beakers 4. Microscope 5. Incubator 6. Platinum loop 7. Microtitre plate 8. Durham tubes 9. Conical Flask 10. Measuring cylinder 11. China dish 12. Funnel 13. Spatula 14. Weighing balance 15. Autoclave 16. Aluminium foil 17. Petri dishes with lids 18. pH meter 19. Burner
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Earthquakes in Australia Australia is a very lucky country that suffers very few earthquakes or volcanic eruptions. Earthquakes are caused by converging plates (usually subducting)‚ and there a 4 different types of waves in two categories; firstly there is Body waves which are broken into primary and secondary waves (these travel through the earth) Surface waves travel through only the crust and are called Love and Rayleigh. These Waves (the earthquakes) are measured by a seismograph/ a device that
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separated or slipped from the metaphysis.1 The germinal cells of the growth plate remain with the epiphysis‚ and the calcified layer remains with the metaphysis. (Physeal Injuries) Type I fractures occur most commonly in the distal tibia and fibula‚1 but are uncommon in the wrist‚ accounting for only 8.5% of all Salter-Harris fractures. (Ped.Distal) Upon examination‚ and athlete will be point tender over the growth plate which warrants a referral to an orthopedist.1 On an x-ray‚ there is soft tissue
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Jaesung Lee Geography 1 Professor Thomas Orf Chapter 14 Questions 1) The first evidence Wegner was able to find was the remarkable number of close affinities of geologic features on both sides of the Atlantic Ocean. He found the continental margins of the subequatorial portions of Africa and South America fit together with jigsaw-on-like precision. He also determined that the petrologic records on both sides of the Atlantic show many distributions- such as ancient coal deposits-that would
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