Trondhjemite and Nephelinite Definition

Definition of Trondhjemite and Nephelinite

The general Trondhjemite and Nephelinite definition can be stated as: 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.. 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 Trondhjemite and Nephelinite, get to know about Properties of Trondhjemite and Nephelinite. Get to know more information about Trondhjemite and Nephelinite origin and discoverer, etymology and class.

History of Trondhjemite and Nephelinite

The history of Trondhjemite 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.

Trondhjemite and Nephelinite Origin and Discoverer

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

Etymology of Trondhjemite and Nephelinite

Along with Trondhjemite and Nephelinite definition, know more about the etymology of Trondhjemite and Nephelinite. Etymology of Trondhjemite and Nephelinite gives information about origin and formation of a particular rock. Know more about Formation of Trondhjemite and Formation of Nephelinite. The etymology of Trondhjemite is From Trondheim, Norway while that of Nephelinite is From Trondheim, Norway. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Trondhjemite and Nephelinite belong to Igneous Rocks. The sub-class, group and other categories of Trondhjemite and Nephelinite are listed below.

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

For Nephelinite,

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