Nephelinite and Trondhjemite Definition

Definition of Nephelinite and Trondhjemite

The general Nephelinite and Trondhjemite 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, Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.. Along with definition of Nephelinite and Trondhjemite, get to know about Properties of Nephelinite and Trondhjemite. Get to know more information about Nephelinite and Trondhjemite origin and discoverer, etymology and class.

History of Nephelinite and Trondhjemite

The history of Nephelinite and Trondhjemite 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 Trondhjemite Origin and Discoverer

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

Etymology of Nephelinite and Trondhjemite

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

For Nephelinite,

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

For Trondhjemite,

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