Variolite and Tonalite Definition

Definition of Variolite and Tonalite

The general Variolite and Tonalite definition can be stated as: 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. 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 Variolite and Tonalite, get to know about Properties of Variolite and Tonalite. Get to know more information about Variolite and Tonalite origin and discoverer, etymology and class.

History of Variolite and Tonalite

The history of Variolite 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.

Variolite and Tonalite Origin and Discoverer

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

Etymology of Variolite and Tonalite

Along with Variolite and Tonalite definition, know more about the etymology of Variolite and Tonalite. Etymology of Variolite and Tonalite gives information about origin and formation of a particular rock. Know more about Formation of Variolite and Formation of Tonalite. The etymology of Variolite is From Latin varius, speckled, variegated while that of Tonalite is From Latin varius, speckled, variegated. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Variolite and Tonalite belong to Igneous Rocks. The sub-class, group and other categories of Variolite and Tonalite are listed below.

For Variolite,

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