Pegmatite and Shale Definition

Definition of Pegmatite and Shale

The general Pegmatite and Shale definition can be stated as: Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals. 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 Pegmatite and Shale, get to know about Properties of Pegmatite and Shale. Get to know more information about Pegmatite and Shale origin and discoverer, etymology and class.

History of Pegmatite and Shale

The history of Pegmatite 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.

Pegmatite and Shale Origin and Discoverer

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

Etymology of Pegmatite and Shale

Along with Pegmatite and Shale definition, know more about the etymology of Pegmatite and Shale. Etymology of Pegmatite and Shale gives information about origin and formation of a particular rock. Know more about Formation of Pegmatite and Formation of Shale. The etymology of Pegmatite is From Greek pegma, pegmat which means- thing joined together + -ite while that of Shale is From Greek pegma, pegmat which means- thing joined together + -ite. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Pegmatite belongs to Igneous Rocks while Shale belongs to Sedimentary Rocks. The sub-class, group and other categories of Pegmatite and Shale are listed below.

For Pegmatite,

• Sub-class: Durable Rock and Hard Rock
• Group: Plutonic
• Other Categories: Coarse 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