Porphyry and Greywacke Definition

Definition of Porphyry and Greywacke

The general Porphyry and Greywacke 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, Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay. Along with definition of Porphyry and Greywacke, get to know about Properties of Porphyry and Greywacke. Get to know more information about Porphyry and Greywacke origin and discoverer, etymology and class.

History of Porphyry and Greywacke

The history of Porphyry and Greywacke 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 Greywacke Origin and Discoverer

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

Etymology of Porphyry and Greywacke

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

For Porphyry,

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

For Greywacke,

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