Obsidian and Syenite Definition

Definition of Obsidian and Syenite

The general Obsidian and Syenite 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, Syenite is a coarse-grained igneous rock which is composed mainly of alkali feldspar and various ferromagnesian minerals. Along with definition of Obsidian and Syenite, get to know about Properties of Obsidian and Syenite. Get to know more information about Obsidian and Syenite origin and discoverer, etymology and class.

History of Obsidian and Syenite

The history of Obsidian and Syenite 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 Syenite Origin and Discoverer

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

Etymology of Obsidian and Syenite

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

For Obsidian,

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

For Syenite,

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