Gneiss and Syenite Definition

Definition of Gneiss and Syenite

The general Gneiss and Syenite 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, Syenite is a coarse-grained igneous rock which is composed mainly of alkali feldspar and various ferromagnesian minerals. Along with definition of Gneiss and Syenite, get to know about Properties of Gneiss and Syenite. Get to know more information about Gneiss and Syenite origin and discoverer, etymology and class.

History of Gneiss and Syenite

The history of Gneiss and Syenite 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 Syenite Origin and Discoverer

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

Etymology of Gneiss and Syenite

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

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