Pegmatite and Tonalite Definition

Definition of Pegmatite and Tonalite

The general Pegmatite and Tonalite definition can be stated as: Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals. On the other hand, Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. Along with definition of Pegmatite and Tonalite, get to know about Properties of Pegmatite and Tonalite. Get to know more information about Pegmatite and Tonalite origin and discoverer, etymology and class.

History of Pegmatite and Tonalite

The history of Pegmatite and Tonalite 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.

Pegmatite and Tonalite Origin and Discoverer

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

Etymology of Pegmatite and Tonalite

Along with Pegmatite and Tonalite definition, know more about the etymology of Pegmatite and Tonalite. Etymology of Pegmatite and Tonalite gives information about origin and formation of a particular rock. Know more about Formation of Pegmatite and Formation of Tonalite. The etymology of Pegmatite is From Greek pegma, pegmat which means- thing joined together + -ite while that of Tonalite is From Greek pegma, pegmat which means- thing joined together + -ite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Pegmatite and Tonalite belong to Igneous Rocks. The sub-class, group and other categories of Pegmatite and Tonalite are listed below.

For Pegmatite,

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

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