Obsidian and Felsite Definition

Definition of Obsidian and Felsite

The general Obsidian and Felsite definition can be stated as: 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. On the other hand, Felsite is a very fine grained volcanic rock that may or may not contain larger crystals and light colored rock that typically requires petrographic examination or chemical analysis for more precise definition. Along with definition of Obsidian and Felsite, get to know about Properties of Obsidian and Felsite. Get to know more information about Obsidian and Felsite origin and discoverer, etymology and class.

History of Obsidian and Felsite

The history of Obsidian and Felsite 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.

Obsidian and Felsite Origin and Discoverer

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

Etymology of Obsidian and Felsite

Along with Obsidian and Felsite definition, know more about the etymology of Obsidian and Felsite. Etymology of Obsidian and Felsite gives information about origin and formation of a particular rock. Know more about Formation of Obsidian and Formation of Felsite. The etymology of Obsidian is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius while that of Felsite is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Obsidian and Felsite belong to Igneous Rocks. The sub-class, group and other categories of Obsidian and Felsite are listed below.

For Obsidian,

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

For Felsite,

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