CRUSTAL DEFORMATION AND GEOLOGIC MAPS LAB ASSIGNMENT Part 1 (12 p...

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CRUSTAL DEFORMATION AND GEOLOGIC MAPS LAB ASSIGNMENT Part 1 (12 points). For the following six diagrams, complete either the map view or the cross-section (marked in red) based on the information provided, drawing in geological contacts and strike and dip symbols. The cross section is drawn across the dashed line in the map view. Brown lines are geological contacts between layers and blue lines represent rivers. 1. 2. 3. 40° 40° 70° 70° Map View - - Cross-section 4. 5. 6. Map View T/ Cross-section Part 2 (24 pts). For each of the following block diagrams complete the following: 1- Complete the diagram drawing in geological contacts on each side of the block; 2- Add symbols indicating the strike and dip of each geological layer as well as symbols documenting any other geological features (include the direction of movement for any faults); 3- - In the space provided under the block diagram write the specific name of the geology feature in the block diagram. Please note that in several of the blocks the ages of the layers are provided. 7. 8. S D M D S O 9. 10. M P T J K 11. 12. Part 3 (20 pts). At the end of the lab there are two full-page block diagrams. Cut along the dashed lines and fold along the solid lines to examine the block in three dimensions. For each of the block diagrams complete the following: 1- - Complete the diagram drawing in geological contacts on each side of the block; 2- Add symbols indicating the strike and dip of each geological layer as well as symbols documenting any other geological features; 3- Identify the geologic structure presented on the block and write the name of the structure on the top surface of the block. Please unfold the blocks flat to mail in to your instructor. Part 4 (24 pts). The geological map on the following page is from the Paleozoic rocks in the Northwest Georgia Mountains. Please refer to the key to rocks and their ages present on the map in order to answer the questions. Cpv Pennsylvanian Fm Cbp Mississippian Fm Dc Chattanooga shale Srm Red Mountain Fm Om Upper Chickamauga Ls Osr Lower Chickamauga (Stones River) On On Newala limestone (Upper Knox) Ock Knox dolomite €c Conasauga shale to CNIA TANDOGA TO CAATTAINOOA Rossville Hooker de Cps Smm $ DAG Cole City ost Mbrgar dise Missionary Sim Boynton Cpv - Cendinat D A E TRENTÓN A > Durham Om) Chigkamainga 1 Cpv. DO by Pond Spring: Rock Sprint goper Heights Cassandra Sm the Smm DEC Brsing Fewri Cc Oml 057 Osr E R ploverdale Cos DOC Julghur 2 Springs Osr OCK Head River Bronco II 20 Lookout : 15. (6 pts) Examine the map and the ages of the rock layers. Based on your interpretation, label the structures and add appropriate symbols to the map to show the axis of the folds. What kind of folds are present in this area? Explain how you came to this conclusion. 16. (6 pts) Along the red line starting at point "A' there are three faults indicated by bold black lines (they are also marked on the cross section in part C). Examine the age of the rocks and the faults themselves. What type of faults are these? Explain how you came to this conclusion. 17. . (12 pts) Complete the following geological cross section based on your understanding of the geological structures present in the area. A Part 5 - Google Earth (20 pts) The exercises that follow use Google Earth. For each question (or set of questions) paste the location that is given into the "Search" box. Examine each location at multiple eye altitudes and differing amounts of tilt. For any measurements use the ruler tool, this can be accessed by clicking on the ruler icon above the image. Search for 38 04 36.00N 109 55 26.61 W and zoom to an eye altitude of 20,000 ft, make sure to note your geographic location. (Hint: Re-read the section in the course content unit on Faults) 18. You are looking at the surface expression of many fault lines, what kind of faults are they? 19. What would we call these paired features? 20. What type of stress created these features? 21. The amount of displacement (extension or shortening) in the area can be calculated by the following equation based on the angle of the fault surface: Amount of horizontal displacement = Vertical displacement along the fault surface (ft)/5.67 Measure the change in elevation of one of these features to determine the amount of extension in the area (Show your work, but feel free to use a calculator). 22. How many of these faults would you need to make this area (Utah) a mile longer? Remember there are 5280 feet in a mile. Search for 22 48 45.63S 117 20 12.85E and zoom to an eye altitude of 25 miles. This feature is caused by the folding of rocks. 23. Give two methods you could use to determine if this structure is a dome or a basin (be specific). 24. Examine the feature - 10 miles southwest of the previous feature. Is this fold horizontal or plunging, how can you tell? 13. (Part 3-1) 14. (Part 3-2)

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