How is relative dating used to evaluate geologic time

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Earth science is founded on basic principles that are useful for making many useful observations about the world around us.This chapter presents a mix of information that is essential (fundamental) to all following chapters.Sediments are solid fragments of inorganic or organic material that come from the weathering of rock and soil erosion, and are carried and deposited by wind, water, or ice (Figure 3-7).Sediments may be made up of rock fragments ranging is size from boulders down to microscopic particles, and may contain organic matter.

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The second half of this chapter focuses on maps and the display of geographic and geologic information in two-dimensional and three-dimensional formats." in which he promoted concepts of the "rock cycle" (Figure 3-3).The rock cycle illustrates the series of events in which a rock of one type is converted to one or more other types, and then possibly back to the original type.There are 4 classes of rocks and earth materials: igneous rocks, sediments (which are not rocks), sedimentary rocks, and metamorphic rocks.Igneous rocks are rocks formed from the cooling and crystallization of molten materials (Figure 3-6).

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