Gneiss and Arkose Definition

Definition of Gneiss and Arkose

The general Gneiss and Arkose 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, Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. Along with definition of Gneiss and Arkose, get to know about Properties of Gneiss and Arkose. Get to know more information about Gneiss and Arkose origin and discoverer, etymology and class.

History of Gneiss and Arkose

The history of Gneiss and Arkose 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 Arkose Origin and Discoverer

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

Etymology of Gneiss and Arkose

Along with Gneiss and Arkose definition, know more about the etymology of Gneiss and Arkose. Etymology of Gneiss and Arkose gives information about origin and formation of a particular rock. Know more about Formation of Gneiss and Formation of Arkose. The etymology of Gneiss is From the Middle High German verb gneist (to spark; so called because the rock glitters) while that of Arkose 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 Arkose belongs to Sedimentary Rocks. The sub-class, group and other categories of Gneiss and Arkose 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 Arkose,

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