Extrusional Tectonics in the Core of a

The Pan-African Kaoko Belt of NW Namibia provides a well-exposed example of material flow in the evolving middle and lower crust during sinistral transpressional orogenesis. The Kaoko Belt is a composite metamorphic belt with shear zone bounded zones of contrasting metamorphic style that were metamorphosed at approx-imately the same time (575–550Ma). It is divided into a Barrovian-style Escape Zone with inclined nappes and thrusts that verge outward towards the foreland, a steep high-grade Orogen Core that experienced intense wrench-style deformation and, in the hin-terland, an older (650Ma) exotic Coastal Terrane that was reworked at moderate-T/low-P conditions during transpressional orogenesis. The kinematic-lineation array (defined by stretching lineations and shear-sense indicators) shows variation in degree and polarity of lineation obliquity to the grain of the belt, lineation plunge and different polarity of vergence along the plunge, wit