Porphyry and Slate Definition

Definition of Porphyry and Slate

The general Porphyry and Slate 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, Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. Along with definition of Porphyry and Slate, get to know about Properties of Porphyry and Slate. Get to know more information about Porphyry and Slate origin and discoverer, etymology and class.

History of Porphyry and Slate

The history of Porphyry and Slate 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 Slate Origin and Discoverer

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

Etymology of Porphyry and Slate

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

For Porphyry,

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

For Slate,

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