Ganister and Obsidian Definition

Definition of Ganister and Obsidian

The general Ganister and Obsidian definition can be stated as: A ganister is a hard, fine-grained quartzose sandstone or orthoquartzite which is basically used in the manufacture of silica brick typically used to line furnaces and is a type of sedimentary 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 Ganister and Obsidian, get to know about Properties of Ganister and Obsidian. Get to know more information about Ganister and Obsidian origin and discoverer, etymology and class.

History of Ganister and Obsidian

The history of Ganister 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.

Ganister and Obsidian Origin and Discoverer

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

Etymology of Ganister and Obsidian

Along with Ganister and Obsidian definition, know more about the etymology of Ganister and Obsidian. Etymology of Ganister and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Ganister and Formation of Obsidian. The etymology of Ganister is From gan′is-ter i.e a hard, close-grained siliceous stone, often forming the stratum which underlies a coal-seam while that of Obsidian is From gan′is-ter i.e a hard, close-grained siliceous stone, often forming the stratum which underlies a coal-seam. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Ganister belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Ganister and Obsidian are listed below.

For Ganister,

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

For Obsidian,

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