Gneiss and Scoria Definition

Definition of Gneiss and Scoria

The general Gneiss and Scoria definition can be stated as: Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. On the other hand, Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities. Along with definition of Gneiss and Scoria, get to know about Properties of Gneiss and Scoria. Get to know more information about Gneiss and Scoria origin and discoverer, etymology and class.

History of Gneiss and Scoria

The history of Gneiss and Scoria 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.

Gneiss and Scoria Origin and Discoverer

Gneiss and Scoria definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Gneiss and Scoria. In this section, you will know about Gneiss and Scoria Origin and Discoverer. Origin of Gneiss and Scoria are Unknown. It is interesting to know the name of Gneiss and Scoria discoverer. The discoverer of Gneiss and Scoria are Unknown.

Etymology of Gneiss and Scoria

Along with Gneiss and Scoria definition, know more about the etymology of Gneiss and Scoria. Etymology of Gneiss and Scoria gives information about origin and formation of a particular rock. Know more about Formation of Gneiss and Formation of Scoria. The etymology of Gneiss is From the Middle High German verb gneist (to spark; so called because the rock glitters) while that of Scoria is From the Middle High German verb gneist (to spark; so called because the rock glitters). The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Gneiss belongs to Metamorphic Rocks while Scoria belongs to Igneous Rocks. The sub-class, group and other categories of Gneiss and Scoria are listed below.

For Gneiss,

• Sub-class: Durable Rock and Hard Rock
• Group: Not applicable
• Other Categories: Coarse grained rock, Medium grained rock and Opaque rock

For Scoria,

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