Gneiss and Foidolite Definition

Definition of Gneiss and Foidolite

The general Gneiss and Foidolite 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, Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%. Along with definition of Gneiss and Foidolite, get to know about Properties of Gneiss and Foidolite. Get to know more information about Gneiss and Foidolite origin and discoverer, etymology and class.

History of Gneiss and Foidolite

The history of Gneiss and Foidolite 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 Foidolite Origin and Discoverer

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

Etymology of Gneiss and Foidolite

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

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