Greywacke and Tonalite Definition

Definition of Greywacke and Tonalite

The general Greywacke and Tonalite 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, Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. Along with definition of Greywacke and Tonalite, get to know about Properties of Greywacke and Tonalite. Get to know more information about Greywacke and Tonalite origin and discoverer, etymology and class.

History of Greywacke and Tonalite

The history of Greywacke and Tonalite 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 Tonalite Origin and Discoverer

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

Etymology of Greywacke and Tonalite

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

For Greywacke,

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

For Tonalite,

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