Gneiss and Anthracite Definition

Definition of Gneiss and Anthracite

The general Gneiss and Anthracite 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, Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster. Along with definition of Gneiss and Anthracite, get to know about Properties of Gneiss and Anthracite. Get to know more information about Gneiss and Anthracite origin and discoverer, etymology and class.

History of Gneiss and Anthracite

The history of Gneiss and Anthracite 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 Anthracite Origin and Discoverer

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

Etymology of Gneiss and Anthracite

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

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