Introduction to geology

Introduction to geology - 1 Introduction to geology 2 Q So...

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1. Introduction to geology 2. Q: So what is Physical Geology? Physical geology is concerned with the materials that make up the Earth as well as the processes that operate on those materials, either at or beneath the surface of the Earth. What materials?: elements, minerals, rocks, water What processes?: plate tectonics, volcanic eruptions, earthquakes, mountain building, the action of rivers, glaciers, oceans, and wind, and weathering and erosion. To understand these processes and the great amounts of time needed to see their lasting impacts, we have to think about time in a whole new way in comparison to human perceptions of time. In geology, we have to think in terms of deep time , in which processes may occur over millions of years. That’s why geologists developed the geologic time scale to divide the long duration of Earth history into numerous time divisions, dating all the way back to about 4600 million years ago!
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Introduction to geology - 1 Introduction to geology 2 Q So...

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