Coal and Porphyry Definition

Definition of Coal and Porphyry

The general Coal and Porphyry definition can be stated as: Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. On the other hand, Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix. Along with definition of Coal and Porphyry, get to know about Properties of Coal and Porphyry. Get to know more information about Coal and Porphyry origin and discoverer, etymology and class.

History of Coal and Porphyry

The history of Coal and Porphyry 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.

Coal and Porphyry Origin and Discoverer

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

Etymology of Coal and Porphyry

Along with Coal and Porphyry definition, know more about the etymology of Coal and Porphyry. Etymology of Coal and Porphyry gives information about origin and formation of a particular rock. Know more about Formation of Coal and Formation of Porphyry. The etymology of Coal is From the Old English term col, which has meant mineral of fossilized carbon since the 13th century while that of Porphyry is From the Old English term col, which has meant mineral of fossilized carbon since the 13th century. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Coal belongs to Sedimentary Rocks while Porphyry belongs to Igneous Rocks. The sub-class, group and other categories of Coal and Porphyry are listed below.

For Coal,

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

For Porphyry,

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