Nephelinite and Rapakivi Granite Definition

Definition of Nephelinite and Rapakivi Granite

The general Nephelinite and Rapakivi Granite 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, Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. Along with definition of Nephelinite and Rapakivi Granite, get to know about Properties of Nephelinite and Rapakivi Granite. Get to know more information about Nephelinite and Rapakivi Granite origin and discoverer, etymology and class.

History of Nephelinite and Rapakivi Granite

The history of Nephelinite and Rapakivi Granite 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 Rapakivi Granite Origin and Discoverer

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

Etymology of Nephelinite and Rapakivi Granite

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

For Nephelinite,

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

For Rapakivi Granite,

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