Arkose and Gneiss Definition

Definition of Arkose and Gneiss

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

History of Arkose and Gneiss

The history of Arkose and Gneiss 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.

Arkose and Gneiss Origin and Discoverer

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

Etymology of Arkose and Gneiss

Along with Arkose and Gneiss definition, know more about the etymology of Arkose and Gneiss. Etymology of Arkose and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Arkose and Formation of Gneiss. The etymology of Arkose is From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones while that of Gneiss is From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Arkose belongs to Sedimentary Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Arkose and Gneiss are listed below.

For Arkose,

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

For Gneiss,

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