Porphyry and Rapakivi Granite Definition

Definition of Porphyry and Rapakivi Granite

The general Porphyry and Rapakivi Granite 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, Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. Along with definition of Porphyry and Rapakivi Granite, get to know about Properties of Porphyry and Rapakivi Granite. Get to know more information about Porphyry and Rapakivi Granite origin and discoverer, etymology and class.

History of Porphyry and Rapakivi Granite

The history of Porphyry and Rapakivi Granite 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 Rapakivi Granite Origin and Discoverer

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

Etymology of Porphyry and Rapakivi Granite

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

For Porphyry,

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

For Rapakivi Granite,

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