Slate and Obsidian Definition

Definition of Slate and Obsidian

The general Slate and Obsidian definition can be stated as: Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. 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 Slate and Obsidian, get to know about Properties of Slate and Obsidian. Get to know more information about Slate and Obsidian origin and discoverer, etymology and class.

History of Slate and Obsidian

The history of Slate 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.

Slate and Obsidian Origin and Discoverer

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

Etymology of Slate and Obsidian

Along with Slate and Obsidian definition, know more about the etymology of Slate and Obsidian. Etymology of Slate and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Slate and Formation of Obsidian. The etymology of Slate is From Old French esclate, from esclat (French éclat) while that of Obsidian is From Old French esclate, from esclat (French éclat). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Slate belongs to Metamorphic Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Slate and Obsidian are listed below.

For Slate,

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

For Obsidian,

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