Obsidian and Oil shale Definition

Definition of Obsidian and Oil shale

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

History of Obsidian and Oil shale

The history of Obsidian and Oil shale 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 Oil shale Origin and Discoverer

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

Etymology of Obsidian and Oil shale

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

For Obsidian,

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

For Oil shale,

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