Phyllite and Obsidian Definition

Definition of Phyllite and Obsidian

The general Phyllite and Obsidian definition can be stated as: Phyllite is a fine-grained metamorphic rock with a well-developed laminar structure, and is intermediate between slate and schist rocks. On the other hand, 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. Along with definition of Phyllite and Obsidian, get to know about Properties of Phyllite and Obsidian. Get to know more information about Phyllite and Obsidian origin and discoverer, etymology and class.

History of Phyllite and Obsidian

The history of Phyllite and Obsidian 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.

Phyllite and Obsidian Origin and Discoverer

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

Etymology of Phyllite and Obsidian

Along with Phyllite and Obsidian definition, know more about the etymology of Phyllite and Obsidian. Etymology of Phyllite and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Phyllite and Formation of Obsidian. The etymology of Phyllite is From Greek phullon leaf + -ite1 while that of Obsidian is From Greek phullon leaf + -ite1. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Phyllite belongs to Metamorphic Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Phyllite and Obsidian are listed below.

For Phyllite,

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

For Obsidian,

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