Nephelinite and Gneiss Definition

Definition of Nephelinite and Gneiss

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

History of Nephelinite and Gneiss

The history of Nephelinite 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.

Nephelinite and Gneiss Origin and Discoverer

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

Etymology of Nephelinite and Gneiss

Along with Nephelinite and Gneiss definition, know more about the etymology of Nephelinite and Gneiss. Etymology of Nephelinite and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Nephelinite and Formation of Gneiss. The etymology of Nephelinite is from French néphéline, from Greek nephelē while that of Gneiss is from French néphéline, from Greek nephelē. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Nephelinite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Nephelinite and Gneiss are listed below.

For Nephelinite,

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