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Grey gneiss that has strongly deformed mafic bands, several generations of granitic veins and sinistral shear bands with leucosome material. The deformation is of unknown age, but may be the steep deformation component of the Errabiddy shear zone. Yarweelor Gneiss (reworked Yilgarn gneiss – protolith 3.7-2.4 Ga)

Grey gneiss that has strongly deformed mafic bands, several generations of granitic veins and sinistral shear bands with leucosome material. The deformation is of unknown age, but may be the steep deformation component of the Errabiddy shear zone. Yarweelor Gneiss (reworked Yilgarn gneiss – protolith 3.7-2.4 Ga)

Photograph: Cees Passchier