Obsidian and Foidolite Definition

Definition of Obsidian and Foidolite

The general Obsidian and Foidolite 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, Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%. Along with definition of Obsidian and Foidolite, get to know about Properties of Obsidian and Foidolite. Get to know more information about Obsidian and Foidolite origin and discoverer, etymology and class.

History of Obsidian and Foidolite

The history of Obsidian and Foidolite 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 Foidolite Origin and Discoverer

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

Etymology of Obsidian and Foidolite

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

For Obsidian,

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

For Foidolite,

• Sub-class: Durable Rock and Soft Rock
• Group: Plutonic
• Other Categories: Coarse grained rock, Fine grained rock, Medium grained rock and Opaque rock