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GEL 1008
PHYSICAL GEOLOGY

Physical Geology On-line Lab and Helpful Lab Hints

Exercise 15: Geologic Maps

Problem 1

  1. Plot the strike and dip symbols as indicated below.
    2. fig 15.10, outcrop A
  2. Complete the geologic map by inferring boundaries between the three rock types.  Symbols are identified on page 254. Click here for a 1/2 finished version.
  3. It might help to complete the cross section (d., below) to determine which rock type is on top.
  4. To make a cross-section from X to Y.
    1. Transfer the rock types present between X and Y on the map to the top of the cross section box at the bottom of the page.
    2. Use the strike and dip symbols in outcrops C, D, and B to determine the trend of the rocks below those points. (see below)
      3. portion of figure 15.10
    3. Hint: Follow the sandstone, what happens to the sandstone layer in the center of the map? On the west side? Click here for a 1/2-finished version.
  5. Compare the map and cross-section to the figures on page 267.

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last updated: 2020-04-04