Gneiss and Nephelinite Definition

Definition of Gneiss and Nephelinite

The general Gneiss and Nephelinite 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, Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).. Along with definition of Gneiss and Nephelinite, get to know about Properties of Gneiss and Nephelinite. Get to know more information about Gneiss and Nephelinite origin and discoverer, etymology and class.

History of Gneiss and Nephelinite

The history of Gneiss and Nephelinite 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 Nephelinite Origin and Discoverer

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

Etymology of Gneiss and Nephelinite

Along with Gneiss and Nephelinite definition, know more about the etymology of Gneiss and Nephelinite. Etymology of Gneiss and Nephelinite gives information about origin and formation of a particular rock. Know more about Formation of Gneiss and Formation of Nephelinite. The etymology of Gneiss is From the Middle High German verb gneist (to spark; so called because the rock glitters) while that of Nephelinite 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 Nephelinite belongs to Igneous Rocks. The sub-class, group and other categories of Gneiss and Nephelinite 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 Nephelinite,

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