Greywacke and Pegmatite Definition

Definition of Greywacke and Pegmatite

The general Greywacke and Pegmatite 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, Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals. Along with definition of Greywacke and Pegmatite, get to know about Properties of Greywacke and Pegmatite. Get to know more information about Greywacke and Pegmatite origin and discoverer, etymology and class.

History of Greywacke and Pegmatite

The history of Greywacke and Pegmatite 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 Pegmatite Origin and Discoverer

Greywacke and Pegmatite definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Greywacke and Pegmatite. In this section, you will know about Greywacke and Pegmatite Origin and Discoverer. Origin of Greywacke and Pegmatite are Unknown. It is interesting to know the name of Greywacke and Pegmatite discoverer. The Discoverer of Greywacke is Unknown and the discoverer of Pegmatite is R. J. Hauy.

Etymology of Greywacke and Pegmatite

Along with Greywacke and Pegmatite definition, know more about the etymology of Greywacke and Pegmatite. Etymology of Greywacke and Pegmatite gives information about origin and formation of a particular rock. Know more about Formation of Greywacke and Formation of Pegmatite. The etymology of Greywacke is From German Grauwacke, from grau grey + wacke while that of Pegmatite 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 Pegmatite belongs to Igneous Rocks. The sub-class, group and other categories of Greywacke and Pegmatite are listed below.

For Greywacke,

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock

For Pegmatite,

• Sub-class: Durable Rock and Hard Rock
• Group: Plutonic
• Other Categories: Coarse grained rock and Opaque rock