Obsidian and Gossan Definition

Definition of Obsidian and Gossan

The general Obsidian and Gossan 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, Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.. Along with definition of Obsidian and Gossan, get to know about Properties of Obsidian and Gossan. Get to know more information about Obsidian and Gossan origin and discoverer, etymology and class.

History of Obsidian and Gossan

The history of Obsidian and Gossan 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 Gossan Origin and Discoverer

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

Etymology of Obsidian and Gossan

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

For Obsidian,

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

For Gossan,

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