Gneiss and Phyllite Definition

Definition of Gneiss and Phyllite

The general Gneiss and Phyllite 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, Phyllite is a fine-grained metamorphic rock with a well-developed laminar structure, and is intermediate between slate and schist rocks. Along with definition of Gneiss and Phyllite, get to know about Properties of Gneiss and Phyllite. Get to know more information about Gneiss and Phyllite origin and discoverer, etymology and class.

History of Gneiss and Phyllite

The history of Gneiss and Phyllite 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 Phyllite Origin and Discoverer

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

Etymology of Gneiss and Phyllite

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

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