Nepheline Syenite and Trondhjemite Definition

Definition of Nepheline Syenite and Trondhjemite

The general Nepheline Syenite and Trondhjemite definition can be stated as: Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz. 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 Nepheline Syenite and Trondhjemite, get to know about Properties of Nepheline Syenite and Trondhjemite. Get to know more information about Nepheline Syenite and Trondhjemite origin and discoverer, etymology and class.

History of Nepheline Syenite and Trondhjemite

The history of Nepheline Syenite 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.

Nepheline Syenite and Trondhjemite Origin and Discoverer

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

Etymology of Nepheline Syenite and Trondhjemite

Along with Nepheline Syenite and Trondhjemite definition, know more about the etymology of Nepheline Syenite and Trondhjemite. Etymology of Nepheline Syenite and Trondhjemite gives information about origin and formation of a particular rock. Know more about Formation of Nepheline Syenite and Formation of Trondhjemite. The etymology of Nepheline Syenite is From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China while that of Trondhjemite is From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Nepheline Syenite and Trondhjemite belong to Igneous Rocks. The sub-class, group and other categories of Nepheline Syenite and Trondhjemite are listed below.

For Nepheline Syenite,

• Sub-class: Durable Rock and Medium Hardness 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