Pegmatite and Coal Definition

Definition of Pegmatite and Coal

The general Pegmatite and Coal definition can be stated as: Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals. On the other hand, Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. Along with definition of Pegmatite and Coal, get to know about Properties of Pegmatite and Coal. Get to know more information about Pegmatite and Coal origin and discoverer, etymology and class.

History of Pegmatite and Coal

The history of Pegmatite and Coal 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 Coal Origin and Discoverer

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

Etymology of Pegmatite and Coal

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

For Pegmatite,

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

For Coal,

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