Obsidian and Diabase Definition

Definition of Obsidian and Diabase

The general Obsidian and Diabase 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, Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar. Along with definition of Obsidian and Diabase, get to know about Properties of Obsidian and Diabase. Get to know more information about Obsidian and Diabase origin and discoverer, etymology and class.

History of Obsidian and Diabase

The history of Obsidian and Diabase 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 Diabase Origin and Discoverer

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

Etymology of Obsidian and Diabase

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

For Obsidian,

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

For Diabase,

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