Ijolite and Gneiss Definition

Definition of Ijolite and Gneiss

The general Ijolite and Gneiss definition can be stated as: Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite. 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 Ijolite and Gneiss, get to know about Properties of Ijolite and Gneiss. Get to know more information about Ijolite and Gneiss origin and discoverer, etymology and class.

History of Ijolite and Gneiss

The history of Ijolite 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.

Ijolite and Gneiss Origin and Discoverer

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

Etymology of Ijolite and Gneiss

Along with Ijolite and Gneiss definition, know more about the etymology of Ijolite and Gneiss. Etymology of Ijolite and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Ijolite and Formation of Gneiss. The etymology of Ijolite is From the first syllable of the Finnish words Ii-vaara, Iijoki, &c. commonly used geographical names in Finland, and the Gr. Xiflos, a stone while that of Gneiss is From the first syllable of the Finnish words Ii-vaara, Iijoki, &c. commonly used geographical names in Finland, and the Gr. Xiflos, a stone. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Ijolite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Ijolite and Gneiss are listed below.

For Ijolite,

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

For Gneiss,

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