Figure G-12 (Appendix G) is a block model to be cut out and folded into a three-dimensional block. The surface with the north arrow represents a horizontal surface. You may want to color some of the beds before assembling the block, to enhance the definition of the folds. After you have assembled your block, draw and label the crestal, trough, and axial traces of all of the folds. Then describe the folds in the block. Your description should consist of two or three complete sentences. Be sure to include whether the folds are cylindrical or noncylindrical, symmetric or asymmetric, the attitude of the fold axis and the axial surface, and the interlimb angle.

Figure G-12

Profile plane