Gneiss and Shale Definition

Definition of Gneiss and Shale

The general Gneiss and Shale 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, Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles. Along with definition of Gneiss and Shale, get to know about Properties of Gneiss and Shale. Get to know more information about Gneiss and Shale origin and discoverer, etymology and class.

History of Gneiss and Shale

The history of Gneiss and Shale 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 Shale Origin and Discoverer

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

Etymology of Gneiss and Shale

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

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Not applicable
• Other Categories: Fine grained rock and Opaque rock