Tonalite and Variolite Definition

Definition of Tonalite and Variolite

The general Tonalite and Variolite 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, Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. Along with definition of Tonalite and Variolite, get to know about Properties of Tonalite and Variolite. Get to know more information about Tonalite and Variolite origin and discoverer, etymology and class.

History of Tonalite and Variolite

The history of Tonalite and Variolite 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 Variolite Origin and Discoverer

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

Etymology of Tonalite and Variolite

Along with Tonalite and Variolite definition, know more about the etymology of Tonalite and Variolite. Etymology of Tonalite and Variolite gives information about origin and formation of a particular rock. Know more about Formation of Tonalite and Formation of Variolite. The etymology of Tonalite is From Tonale Pass, northern Italy, + -ite1 while that of Variolite 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 Variolite belong to Igneous Rocks. The sub-class, group and other categories of Tonalite and Variolite 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 Variolite,

• Sub-class: Durable Rock and Hard Rock
• Group: Volcanic
• Other Categories: Opaque rock