Gneiss and Borolanite Definition

Definition of Gneiss and Borolanite

The general Gneiss and Borolanite definition can be stated as: 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. On the other hand, Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix. Along with definition of Gneiss and Borolanite, get to know about Properties of Gneiss and Borolanite. Get to know more information about Gneiss and Borolanite origin and discoverer, etymology and class.

History of Gneiss and Borolanite

The history of Gneiss and Borolanite 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.

Gneiss and Borolanite Origin and Discoverer

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

Etymology of Gneiss and Borolanite

Along with Gneiss and Borolanite definition, know more about the etymology of Gneiss and Borolanite. Etymology of Gneiss and Borolanite gives information about origin and formation of a particular rock. Know more about Formation of Gneiss and Formation of Borolanite. The etymology of Gneiss is From the Middle High German verb gneist (to spark; so called because the rock glitters) while that of Borolanite is From the Middle High German verb gneist (to spark; so called because the rock glitters). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Gneiss belongs to Metamorphic Rocks while Borolanite belongs to Igneous Rocks. The sub-class, group and other categories of Gneiss and Borolanite are listed below.

For Gneiss,

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

For Borolanite,

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