Obsidian and Adamellite Definition

Definition of Obsidian and Adamellite

The general Obsidian and Adamellite 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, Adamellite is a coarse-grained porphyritic igneous rock, a variety of Monzogranite and dominated by phenocrysts of orthoclase in a granular groundmass of perthite, plagioclase and quartz. Along with definition of Obsidian and Adamellite, get to know about Properties of Obsidian and Adamellite. Get to know more information about Obsidian and Adamellite origin and discoverer, etymology and class.

History of Obsidian and Adamellite

The history of Obsidian and Adamellite 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 Adamellite Origin and Discoverer

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

Etymology of Obsidian and Adamellite

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

For Obsidian,

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

For Adamellite,

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