ductile shear zone in high grade gneiss, Rio de Janeiro. PhotoID87
ductile shear zone in high grade gneiss, Rio de Janeiro. PhotoID87
Photograph: Cees Passchier
ductile shear zone in high grade gneiss, Rio de Janeiro. PhotoID87
ductile shear zone in high grade gneiss, Rio de Janeiro. PhotoID87
Photograph: Cees Passchier