Andesite and Obsidian Definition

Definition of Andesite and Obsidian

The general Andesite and Obsidian 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, Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Along with definition of Andesite and Obsidian, get to know about Properties of Andesite and Obsidian. Get to know more information about Andesite and Obsidian origin and discoverer, etymology and class.

History of Andesite and Obsidian

The history of Andesite and Obsidian 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 Obsidian Origin and Discoverer

Andesite and Obsidian definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Andesite and Obsidian. In this section, you will know about Andesite and Obsidian Origin and Discoverer. Origin of Andesite is North America whereas Origin of Obsidian is Ethiopia. It is interesting to know the name of Andesite and Obsidian discoverer. The Discoverer of Andesite is Theodor von Gümbel and the discoverer of Obsidian is Obsius.

Etymology of Andesite and Obsidian

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

For Andesite,

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

For Obsidian,

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