Variolite and Phonolite Definition

Definition of Variolite and Phonolite

The general Variolite and Phonolite 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, Phonolite is an uncommon extrusive igneous rock volcanic rock of intermediate chemical composition between felsic and mafic. Along with definition of Variolite and Phonolite, get to know about Properties of Variolite and Phonolite. Get to know more information about Variolite and Phonolite origin and discoverer, etymology and class.

History of Variolite and Phonolite

The history of Variolite and Phonolite 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 Phonolite Origin and Discoverer

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

Etymology of Variolite and Phonolite

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

For Variolite,

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

For Phonolite,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock