Nephelinite and Variolite Definition

Definition of Nephelinite and Variolite

The general Nephelinite and Variolite 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, Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. Along with definition of Nephelinite and Variolite, get to know about Properties of Nephelinite and Variolite. Get to know more information about Nephelinite and Variolite origin and discoverer, etymology and class.

History of Nephelinite and Variolite

The history of Nephelinite and Variolite 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 Variolite Origin and Discoverer

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

Etymology of Nephelinite and Variolite

Along with Nephelinite and Variolite definition, know more about the etymology of Nephelinite and Variolite. Etymology of Nephelinite and Variolite gives information about origin and formation of a particular rock. Know more about Formation of Nephelinite and Formation of Variolite. The etymology of Nephelinite is from French néphéline, from Greek nephelē while that of Variolite 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 and Variolite belong to Igneous Rocks. The sub-class, group and other categories of Nephelinite and Variolite are listed below.

For Nephelinite,

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

For Variolite,

• Sub-class: Durable Rock and Hard Rock
• Group: Volcanic
• Other Categories: Opaque rock