The general Greywacke and Gneiss definition can be stated as: Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay. On the other hand, Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. Along with definition of Greywacke and Gneiss, get to know about Properties of Greywacke and Gneiss. Get to know more information about Greywacke and Gneiss origin and discoverer, etymology and class.
The history of Greywacke and Gneiss gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.
Greywacke and Gneiss definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Greywacke and Gneiss. In this section, you will know about Greywacke and Gneiss Origin and Discoverer. Origin of Greywacke and Gneiss are Unknown. It is interesting to know the name of Greywacke and Gneiss discoverer. The discoverer of Greywacke and Gneiss are Unknown.
Along with Greywacke and Gneiss definition, know more about the etymology of Greywacke and Gneiss. Etymology of Greywacke and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Greywacke and Formation of Gneiss. The etymology of Greywacke is From German Grauwacke, from grau grey + wacke while that of Gneiss is From German Grauwacke, from grau grey + wacke. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Greywacke belongs to Sedimentary Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Greywacke and Gneiss are listed below.
For Greywacke,
For Gneiss,