MYLONITES, FOLDS IN
Folding is invariably developed in the mylonite layering and commonly the axes of these folds are parallel to the lineation [for some examples see Hooper (1968); Trouw (1973); Hossack (1968), (Scandinavia); Christie (1963), (Scotland); Zwart (1958), (Pyrenees); Brown (1967), (Grenville Front, Canada); Stirewalt and Dunn (1973), (North Carolina, United States); Forman (1971), (Central Australia)]. Although this parallelism of fold axes and lineation is common it is important to point out that the relationship is not always developed [for examples see Kvale (1941, 1953)]. The folds vary from open through tight to isoclinal and are commonly intrafolial. Invariably where such folds are developed there appears to be a secondary mylonite layering developed parallel to their axial planes. The geometrical relationships between layering, lineation, and folding within mylonite zones have been poorly studied for the most part and there is a need for more detailed study.