Andesite and Tonalite Definition

Definition of Andesite and Tonalite

The general Andesite and Tonalite definition can be stated as: Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava. 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 Andesite and Tonalite, get to know about Properties of Andesite and Tonalite. Get to know more information about Andesite and Tonalite origin and discoverer, etymology and class.

History of Andesite and Tonalite

The history of Andesite 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.

Andesite and Tonalite Origin and Discoverer

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

Etymology of Andesite and Tonalite

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

For Andesite,

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