Gossan and Obsidian Definition

Definition of Gossan and Obsidian

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

History of Gossan and Obsidian

The history of Gossan 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.

Gossan and Obsidian Origin and Discoverer

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

Etymology of Gossan and Obsidian

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

For Gossan,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• Other Categories: 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