Gneiss and Appinite Definition

Definition of Gneiss and Appinite

The general Gneiss and Appinite 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, Appinite is an igneous rock in which the crystals are so fine grained that individual minerals cannot be easily distinguished. Along with definition of Gneiss and Appinite, get to know about Properties of Gneiss and Appinite. Get to know more information about Gneiss and Appinite origin and discoverer, etymology and class.

History of Gneiss and Appinite

The history of Gneiss and Appinite 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 Appinite Origin and Discoverer

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

Etymology of Gneiss and Appinite

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

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