Obsidian and Aplite Definition

Definition of Obsidian and Aplite

The general Obsidian and Aplite 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, Aplite is a fine-grained granite composed mainly of feldspar and quartz. Along with definition of Obsidian and Aplite, get to know about Properties of Obsidian and Aplite. Get to know more information about Obsidian and Aplite origin and discoverer, etymology and class.

History of Obsidian and Aplite

The history of Obsidian and Aplite 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 Aplite Origin and Discoverer

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

Etymology of Obsidian and Aplite

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

For Obsidian,

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

For Aplite,

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