Argillite and Gneiss Definition

Definition of Argillite and Gneiss

The general Argillite and Gneiss definition can be stated as: 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. 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 Argillite and Gneiss, get to know about Properties of Argillite and Gneiss. Get to know more information about Argillite and Gneiss origin and discoverer, etymology and class.

History of Argillite and Gneiss

The history of Argillite 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.

Argillite and Gneiss Origin and Discoverer

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

Etymology of Argillite and Gneiss

Along with Argillite and Gneiss definition, know more about the etymology of Argillite and Gneiss. Etymology of Argillite and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Argillite and Formation of Gneiss. The etymology of Argillite is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite while that of Gneiss is From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Argillite belongs to Sedimentary Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Argillite and Gneiss are listed below.

For Argillite,

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

For Gneiss,

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