1. On separate pieces of tracing paper construct a b-diagram and p-diagram for the folds in Figure...

Question:

1. On separate pieces of tracing paper construct a b-diagram and p-diagram for the folds in Figure G-17 (Appendix G). Determine the trend and plunge of the fold axis.

2. Construct a profile view as shown in Fig. 7.6, and draw surface axial traces on the plan view. Determine the strike of the axial plane.

3. Draw a simple equal-area diagram, such as those in Fig. 7.7, showing the orientation of these folds.

4. Succinctly but completely describe these folds. Include the attitude of the fold axis, attitude of the axial plane, interlimb angle, symmetry, and fold class.

Fig. 7.6N

b ds

Profile Surface % ds

Axial trace. d

OOO b a Ax. pl.: vertical Axis: horizontal Ax. pl.: vertical Axis: plunges N Ax. pl.: vertical Axis: vertical

d Ax. pl.: inclined to W Axis: horizontal Ax. pl.: inclined to W Axis: plunges NW Fig. 7.7 Simple equal-area

Figure G-17

50 55 70 76 EP1 44 80

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Structural Analysis And Synthesis A Laboratory Course In Structural Geology

ISBN: 9781405116527

3rd Edition

Authors: Stephen M. Rowland, Ernest M. Duebendorfer, Ilsa M. Schiefelbein

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