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Georgia Southern University *

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Geology

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Jan 9, 2024

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pdf

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6

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Questions A. Forming Unconformities 1. The panels in Figure 6 below represent the sequential formation of a nonconformity. List the panels in their correct order from oldest to youngest. C (youngest) Figure 6. Nonconformity sequence puzzle. 2. The panels in Figure 7 below represent the sequential formation of an angular unconformity. List the panels in their correct order from oldest to youngest. Figure 7. Angular unconformity sequence puzzle.
3. The panels in Figure 8 below r their correct order from oldest epresent the sequential formation of a disconformity. List the panels in to youngest. (oldest JV ') I\ \- \ - g ~— (youngest) Figure 8. Disconformity sequence puzzle. B. Sequence of Events Diagrams 4. A geologic sequence diagram is a geologic cross-section where the relative determined. Using the six geologic principles from above, determine the rel units for the following cross section. order of events has been ative ages of the rock Youngest Figure 9. A simplified geologic cross-section. Unit R is an igneous intrusion with a "bake zone" (stippling).
Geologic History of Lava Canyon Let'g use some relative dating concepts to reconstruct the geologic history of Lava Canyon. Use the Key to Fill Patterns to Rock Units at the back of this lab to answer the following questions Figure 10. The Lava Canyon sequence diagram. 5. Determine the relative sequence of ages (oldest to youngest) of the rock units in Figure 10. Label the titling as T1. Do not include the unconformities X, Y, and Z. "\ 1 - 1 X \ ‘\‘\ | s ( \ \\ T \ \ (oldesty T\ Y= - . (younges?) a. Which type of unconformity is Z? RO\ ) (N TR i\, 7\“\, AT b. Which type of unconformity is Y? __ \\ (OVINER _T_\mlf B0 L R ¢. Which type of unconformity is X? __ L\ \\_\,\.L_ o SR Nl NN G d. Which type of metamorphic rock formed in the baked zone at Unit G? _A__,hLIA;_L"_L /o e. Which geologic principle allowed you to determine the relative ages of units K-C and S-F? © v 2 | \ / \‘, \ /\\ \( O \\\\\\ ) \\\\\\ ik gt \ f. Explain in one complete sentence why Unit D is younger. than all the other rock unnts \y\\\u‘*\" (\\\‘\x‘-‘\' g. |fintrusion M was dated to be 38 Ma and intrusion T was dated to be 26 Ma, then: - How oldis layer A? Older than 38 Ma 267to 38 Ma™ Younger than 26 Ma - When did tilting of layers H-C occur? Before 38 Ma 26 to 38 Ma K Aflem‘\‘ I R R R R R R R R R R R R R R R R R O R O R RO R R R R R R R R R R R R RRRRERESRDRDRERERED
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