What Is The Relationship Between Granite And Gneiss

Detail of southwest sector of western gneiss terrain and adjacent granite green stone terrainthe thick broken line marks the boundary between normal granite green stone to east and metamorphosed deformed granitoids related to granite greenstone terrains relations in southwest yilgarn the southern part of the western gneiss terrain fig.

What is the relationship between granite and gneiss. Granite is a plutonic rock formed from magma cooling. Gneiss gets a characteristic bannered from feldespatic and micaceous minerals. Granite is a granulated rock from the same minerals and quartz. Gneiss is a metamorphic rock formed by accumulative sediment pressing.

Granite gneiss can also form through the metamorphism of sedimentary rocks. One layer was formerly paleosome a metamorphic rock that was reconstituted subsequently by partial melting. It consists of two or more constituents often layered repetitively. The yarlarweelor gneiss complex in the capricon orogen of western australia provides an example of the close links between metamorphism regional scale deformation and granite generation and emplacement.

The alternate layer has a pegmatitic aplitic granitic or generally plutonic appearance. A photograph of polished gneiss from the stock of a countertop vendor. To study the relationship between brittleness index and k for different rock types we use a variety of functional forms e g exponential logarithmic power and linear to fit the test data. There is also a change in the structure and relationship of greenstone belts to their basements between the archaean where there is little clear relationship if any between basalt peridotite sheets of a greenstone belt and the granites they abut and the proterozoic where greenstone belts sit upon granite gneiss basements and or other.

A variety of functional forms are also used to fit the comprehensive data i e synthesis of granite gneiss and limestone data for different rock types. Commonly migmatites occur below. The view shown in the photo is about 12 inches across.