Oil shale and Obsidian Definition

Definition of Oil shale and Obsidian

The general Oil shale and Obsidian definition can be stated as: Oil Shale is a fine-grained sedimentary rock from which oil is extracted. 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 Oil shale and Obsidian, get to know about Properties of Oil shale and Obsidian. Get to know more information about Oil shale and Obsidian origin and discoverer, etymology and class.

History of Oil shale and Obsidian

The history of Oil shale 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.

Oil shale and Obsidian Origin and Discoverer

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

Etymology of Oil shale and Obsidian

Along with Oil shale and Obsidian definition, know more about the etymology of Oil shale and Obsidian. Etymology of Oil shale and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Oil shale and Formation of Obsidian. The etymology of Oil shale is From Old English scealu in its base sense of thing that divides or separate while that of Obsidian is From Old English scealu in its base sense of thing that divides or separate. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Oil shale belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks. The sub-class, group and other categories of Oil shale and Obsidian are listed below.

For Oil shale,

• Sub-class: Durable Rock and Soft Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock

For Obsidian,

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