Figure G-23 contains a geologic map that shows both the bedding and cleavage attitudes. Using the cleavage– bedding relations discussed above, sketch a cross section of the map area showing the form of the folds. There are no contacts between the rock units shown on the map; show the geometry of the folds schematically by sketching the form lines of hypothetical bedding surfaces, as is done in Fig. 8.6.

Figure G-23

a b A A 50 50 Foliation attitude Axial surface 50 504 A' -A' Fig. 8.6 Axial-planar foliations (cleavage). (a) Map showing attitudes of foliations and parasitic folds. (b) Structure section A-A'.