Greywacke and Ijolite Definition

Definition of Greywacke and Ijolite

The general Greywacke and Ijolite 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, Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite. Along with definition of Greywacke and Ijolite, get to know about Properties of Greywacke and Ijolite. Get to know more information about Greywacke and Ijolite origin and discoverer, etymology and class.

History of Greywacke and Ijolite

The history of Greywacke and Ijolite 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 Ijolite Origin and Discoverer

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

Etymology of Greywacke and Ijolite

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

For Greywacke,

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

For Ijolite,

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