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geologictimelab - GreggIrving 020407 EPS50 Introduction...

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Gregg Irving 02-04-07 EPS 50 Geologic Time Lab Report Introduction: Geologic time is a scale used to compare and contrast events that have occurred during the history of the Earth and the universe. With the use of this scale, geologists can divide history into eras, periods, epochs, among other scales, and study the development of modern Earth. For Earth, geologic time starts about 4.5 billion years ago with the formation of the planet. Relative geologic time is a scale used to categorize events in the history of Earth in like groups to study more efficiently. Studying the layers of the Earth, the younger ones on top of the older ones, and the fossils that lie within and correlating the two together determine relative geologic time. By grouping events and organisms into time periods, geologists can study trends of geologic processes through the theory of uniformitarianism. Geological and topographical maps outline the features of a given area and provide a wealth of information to the observer. Geological maps highlight the surface occurrence of rock types and their age, as well as fault lines. Topographical maps outline the lay of the land by defining elevation variations, including bodies of water.
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