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8 3 absolute dating of rocks and fossils

This page has been archived and is no longer updated. Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4. Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free. These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing. As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.
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Dating Fossils – How Are Fossils Dated?

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DETERMINING AGE OF ROCKS AND FOSSILS

There are two types of age determinations. Geologists in the late 18th and early 19th century studied rock layers and the fossils in them to determine relative age. William Smith was one of the most important scientists from this time who helped to develop knowledge of the succession of different fossils by studying their distribution through the sequence of sedimentary rocks in southern England. It wasn't until well into the 20th century that enough information had accumulated about the rate of radioactive decay that the age of rocks and fossils in number of years could be determined through radiometric age dating. This activity on determining age of rocks and fossils is intended for 8th or 9th grade students. It is estimated to require four hours of class time, including approximately one hour total of occasional instruction and explanation from the teacher and two hours of group team and individual activities by the students, plus one hour of discussion among students within the working groups. Explore this link for additional information on the topics covered in this lesson:
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Dating Rocks and Fossils Using Geologic Methods

Cart 0. Crabs, Lobsters, Shrimp, etc. Floating Frame Display Cases. Parotodus Mackerel Shark. Other Fossil Shellfish.
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Activity 8. Venn diagram of fossils. Geologic cross section of rocks of rock these fossils. Color family, facts, scavenger and ladies and fossils 8. Earth science worksheets.
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