Gneiss and Shoshonite Definition

Definition of Gneiss and Shoshonite

The general Gneiss and Shoshonite 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, Shoshonite is a basaltic rock, properly a potassic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundmass with calcic plagioclase and sanidine and some dark-colored volcanic glass. Along with definition of Gneiss and Shoshonite, get to know about Properties of Gneiss and Shoshonite. Get to know more information about Gneiss and Shoshonite origin and discoverer, etymology and class.

History of Gneiss and Shoshonite

The history of Gneiss and Shoshonite 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 Shoshonite Origin and Discoverer

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

Etymology of Gneiss and Shoshonite

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

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