Gneiss and Picrite Definition

Definition of Gneiss and Picrite

The general Gneiss and Picrite 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, Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. Along with definition of Gneiss and Picrite, get to know about Properties of Gneiss and Picrite. Get to know more information about Gneiss and Picrite origin and discoverer, etymology and class.

History of Gneiss and Picrite

The history of Gneiss and Picrite 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 Picrite Origin and Discoverer

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

Etymology of Gneiss and Picrite

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

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