Obsidian and Dacite Definition

Definition of Obsidian and Dacite

The general Obsidian and Dacite 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, Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite. Along with definition of Obsidian and Dacite, get to know about Properties of Obsidian and Dacite. Get to know more information about Obsidian and Dacite origin and discoverer, etymology and class.

History of Obsidian and Dacite

The history of Obsidian and Dacite 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 Dacite Origin and Discoverer

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

Etymology of Obsidian and Dacite

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

For Obsidian,

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

For Dacite,

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