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Porphyry and Dacite Definition


Dacite and Porphyry Definition


Definition

Definition
Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix   
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite   

History
  
  

Origin
Egypt   
Romania and Moldova, Europe   

Discoverer
Unknown   
Unknown   

Etymology
From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites   
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described   

Class
Igneous Rocks   
Igneous Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Soft Rock   

Family
  
  

Group
Plutonic   
Volcanic   

Other Categories
Fine Grained Rock, Opaque Rock   
Fine Grained Rock, Medium Grained Rock, Opaque Rock   

Texture >>
<< Summary

Definition of Porphyry and Dacite

The general Porphyry and Dacite 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, Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite. Along with definition of Porphyry and Dacite, get to know about Properties of Porphyry and Dacite. Get to know more information about Porphyry and Dacite origin and discoverer, etymology and class.

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History of Porphyry and Dacite

The history of Porphyry and Dacite 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 Dacite Origin and Discoverer

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

Etymology of Porphyry and Dacite

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

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