Porphyry and Shale Definition

Definition of Porphyry and Shale

The general Porphyry and Shale definition can be stated as: Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix. 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 Porphyry and Shale, get to know about Properties of Porphyry and Shale. Get to know more information about Porphyry and Shale origin and discoverer, etymology and class.

History of Porphyry and Shale

The history of Porphyry 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.

Porphyry and Shale Origin and Discoverer

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

Etymology of Porphyry and Shale

Along with Porphyry and Shale definition, know more about the etymology of Porphyry and Shale. Etymology of Porphyry and Shale gives information about origin and formation of a particular rock. Know more about Formation of Porphyry and Formation of Shale. The etymology of Porphyry is From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites while that of Shale is From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Porphyry belongs to Igneous Rocks while Shale belongs to Sedimentary Rocks. The sub-class, group and other categories of Porphyry and Shale are listed below.

For Porphyry,

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