Trondhjemite and Phonolite Definition

Definition of Trondhjemite and Phonolite

The general Trondhjemite and Phonolite 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, Phonolite is an uncommon extrusive igneous rock volcanic rock of intermediate chemical composition between felsic and mafic. Along with definition of Trondhjemite and Phonolite, get to know about Properties of Trondhjemite and Phonolite. Get to know more information about Trondhjemite and Phonolite origin and discoverer, etymology and class.

History of Trondhjemite and Phonolite

The history of Trondhjemite and Phonolite 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 Phonolite Origin and Discoverer

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

Etymology of Trondhjemite and Phonolite

Along with Trondhjemite and Phonolite definition, know more about the etymology of Trondhjemite and Phonolite. Etymology of Trondhjemite and Phonolite gives information about origin and formation of a particular rock. Know more about Formation of Trondhjemite and Formation of Phonolite. The etymology of Trondhjemite is not available while that of Phonolite is not available. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Trondhjemite and Phonolite belong to Igneous Rocks. The sub-class, group and other categories of Trondhjemite and Phonolite 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 Phonolite,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock