Gneiss and Argillite Definition

Definition of Gneiss and Argillite

The general Gneiss and Argillite 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, Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate. Along with definition of Gneiss and Argillite, get to know about Properties of Gneiss and Argillite. Get to know more information about Gneiss and Argillite origin and discoverer, etymology and class.

History of Gneiss and Argillite

The history of Gneiss and Argillite 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 Argillite Origin and Discoverer

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

Etymology of Gneiss and Argillite

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

For Gneiss,

• Sub-class: Durable Rock and Hard Rock
• Group:
• Other Categories: Coarse grained rock, Medium grained rock and Opaque rock

For Argillite,

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