They began to form by a combination of volcanic activity and the deposit of marine sediments. It formed along northwest Africa about 530 million years ago. ... As the Appalachian Mountains eroded, sand and clay were deposited over Florida's limestone layer.
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I think twice the size of Olympic park
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taking data from a population rather than a specific group of people to gather information from
(random and most representative on a large scale of people)
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because, in reality, the development of a country's economy ... make an important contribution to the analysis of levels of development.
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