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Unformatted text preview: Geologic Time: Putting the Earths events in chronological order is one of the most significant scientific contributions. The geologic time scale was first developed using relative dating methods (page 4 of this handout). Absolute ages were assigned with the discovery and application of radioactive isotopes. You may google search for other explanations of geologic time. The United States Geological Survey has this information: http://pubs.usgs.gov/gip/geotime/geotime.html Questions: 1. Understand the difference between catastrophism and unifomitarianism. 2. Understand the difference between relative and absolute time. Briefly describe. Relative time: 3. Be able to name and describe: i. The law of original continuity. ii. The law of horizontality iii. The law of superposition iv. The law of cross-cutting relationships 1 v. The law of fossil succession 4. Draw a cross-section of a sequence of sedimentary rock layers. Label and explain the laws of Draw a cross-section of a sequence of sedimentary rock layers....
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- Geologic Time Scale