Tonalite and Nepheline Syenite Definition

Definition of Tonalite and Nepheline Syenite

The general Tonalite and Nepheline Syenite definition can be stated as: Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. On the other hand, Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz. Along with definition of Tonalite and Nepheline Syenite, get to know about Properties of Tonalite and Nepheline Syenite. Get to know more information about Tonalite and Nepheline Syenite origin and discoverer, etymology and class.

History of Tonalite and Nepheline Syenite

The history of Tonalite and Nepheline Syenite 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.

Tonalite and Nepheline Syenite Origin and Discoverer

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

Etymology of Tonalite and Nepheline Syenite

Along with Tonalite and Nepheline Syenite definition, know more about the etymology of Tonalite and Nepheline Syenite. Etymology of Tonalite and Nepheline Syenite gives information about origin and formation of a particular rock. Know more about Formation of Tonalite and Formation of Nepheline Syenite. The etymology of Tonalite is From Tonale Pass, northern Italy, + -ite1 while that of Nepheline Syenite is From Tonale Pass, northern Italy, + -ite1. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Tonalite and Nepheline Syenite belong to Igneous Rocks. The sub-class, group and other categories of Tonalite and Nepheline Syenite are listed below.

For Tonalite,

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

For Nepheline Syenite,

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