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The existence and movement of tectonic plates is natural phenomena that are unnoticeable. However, other volcanic and vulcanic land forming processes such as magma generation, metamorphism, faulting, folding, earthquake, igneous intrusions, and volcanic actions are usually as a result of plate tectonic activities (Frankel 54). Another evidence for the existence and movement of plate tectonics is the existence of six large pieces (six continents) and other twenty other small pieces such as Hawaii, Lanai, Oahu, Niihau, Molokai and Kahoolawe (Frankel 54). Scientists hypothesize that plate tectonic movements began breaking a single continent land mass into smaller and bigger pieces in about 200 million years ago (Monroe 36). Convectional currents originating deep inside the Earth pushed and pulled these plates at the surface creating a diverging plate boundary. A plume of hot magma originating deep within the mantle then pushed the crust creating pressure that caused the single continent to split and separate (Monroe 37). Other types of plate boundaries include convergent, transform and plate boundary zones.
In conclusion, the Earth’s crust is made up of a series of plates that are in constant movements either away or towards each other. Most of the volcanic eruptions and earthquakes occur near or along tectonic boundaries. This is because these processes are caused by melting, pushing, scraping, and pulling of the Earth’s surface along tectonic plate boundaries.
Monroe J. S, Reed W, Richard H. Physical Geology: Exploring the Earth; [the Wrath of Hurricane Katrina; Could You Survive a Tsunami?; Catastrophic Earthquakes; Global Warming]. Belmont [u.a.: Thomson, 2006.
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The assumption informing this focus is that community support groups may produce an increased sense of wellbeing and improved self-esteem as well as reduce the physical, social and emotional strains often experienced by the elderly. Moreover, the value of such groups may also prove beneficial in reducing the use of medication (polypharmacy), unplanned hospital admissions and the number of home visits by community nurses.
It was not until the 1960s that scientists were able to explain the mechanism, finally answering Wegener's problem, which was that solid continental and oceanic plates floated on a molten rock bed. This became known as Plate Tectonic Theory and has become widely accepted by geologists.
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erved as the profitable way to trade – “without that great trade route, neither the government, nor the defense, nor the administration of the orbis romanus would have been possible.” (Pirenne, 3) Even though the government policy changed and the cultural development faded
ory funding for their defense connected atomic energy plans, $7.7 billion for the defense-connected activities in other organizations, and $137.7 billion for veterans benefits and services. The Treasury should set away $67.2 billion to take care of the unfunded charges and/or
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Historians believe that native people