Granite gneiss terrain

Fedo, C. M., Eriksson, K. A. Blenkinsop, T. G. 1995. Geologic history of the Archean Buhwa greenstone belt and surrounding granite-gneiss terrain, Zimbabwe, with implications for the evolution of the Limpopo Belt. Canadian Journal of Earth Sciences, 32 1977-1990. 

Of these, late Archaean sedimentary basins are the most "modern" in their form and can be clearly recognized as upper crust. Similarly, the relatively low metamorphic grade of many Archaean greenstone belts indicates that they too represent upper Archaean crust. In contrast, Archaean granite-gneiss terrains more commonly belong to the deeper continental crust and variously represent middle to lower continental crust. There are only a few places... 

Archaean Cratons contain three different types of lithological association, each of which provides important information about the early stages of the Earth System. These associations are Archaean greenstone belts, late Archaean sedimentary basins, and Archaean granite-gneiss terrains. We will consider each in turn. 

TABLE 1.5 Examples of important Archaean granite-gneiss terrains discussed in the text. 

North Atlantic (Lewisian Gneiss) UK 2.5-2.95 The first Archaean granite-gneiss terrain to be chronologically segmented as a result of structural mapping... 

North Atlantic (Godhabsfjord area) Greenland 2.5-3.8 The first Archaean granite-gneiss terrain to be identified as segmented into terranes, on the basis of zircon geochronology... 

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