Fig. 5
From: Preparation zones for large crustal earthquakes consequent on fault-valve action
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40623-020-01153-x/MediaObjects/40623_2020_1153_Fig5_HTML.png)
a Mother Lode Au–quartz vein system hosted near Melones Fault, Coulterville, CA; inset at lower left shows Au–quartz veins boudinaged in steep reverse-sense ductile shear zone, Ferderber Mine, Val d’Or, Quebec. b Structural characteristics of fault-valve vein systems hosted on steep reverse faults (schematic and not-to-scale)