{"id":1095,"date":"2020-11-05T23:44:27","date_gmt":"2020-11-06T04:44:27","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/geolmanual\/?post_type=part&p=1095"},"modified":"2020-11-14T17:02:45","modified_gmt":"2020-11-14T22:02:45","slug":"chapter-8-structures-2","status":"publish","type":"part","link":"https:\/\/pressbooks.bccampus.ca\/geolmanual\/part\/chapter-8-structures-2\/","title":{"raw":"Chapter 8. Geological Structures, Part B: Folds, Faults, and Unconformities","rendered":"Chapter 8. Geological Structures, Part B: Folds, Faults, and Unconformities"},"content":{"raw":"

Introduction<\/h1>\r\nIn this chapter you will apply what you've learned about structural cross-sections to examining more complex structures on geological maps. Understanding geological structures is important for engineering purposes and safety considerations, as was the case with the Vajont Dam disaster, but some geological structures can also tell us about the forces that have acted on Earth's crust in the past. The structures can also tell us about conditions at the time those forces were acting. Folds<\/strong>\u2014when fragments of Earth's crust bend without breaking\u2014indicate that the rocks being deformed were deeper in Earth's crust and subject to higher pressures and temperatures. Faults<\/strong>\u2014when rocks break and move relative to each other along that break\u2014are the result of cooler rocks being deformed closer to the surface. Unconformities<\/strong> are buried surfaces that indicate a gap in time. That gap can be the result of a variety of processes that either stopped the formation of new rocks, or eroded away existing ones.\r\n
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Learning Outcomes<\/h1>\r\nAfter completing this chapter, you should be able to:\r\n