| Minor structures may be used to infer the direction and sense of past
displacements in shear zones. In the upper photograph we see a view of asymmetric feldspar
augen and associated s-c fabrics in gneisses. This view may be combined with the measured
orientation of strongly lineated rocks. The augen are viewed on a vertical face, looking
towards SW. The lower photograph (looking NW)shows a
view onto the plane of foliation to see stretched melanocratic pods (former autoliths
within the original meta-igneous rock). The foliation here is oriented 045-56SE with the
stretching lineation plunging 54 degrees towards 122. |
