Porphyry and Amphibolite Types and Facts
Types
Rhomb Porphyry
Hornblendite
Features
Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny
Clasts are smooth to touch, Matrix variable, Surfaces are often shiny
Archaeological Significance
Famous Monuments
Data Not Available
Data Not Available
Famous Sculptures
Data Not Available
Data Not Available
Pictographs
Not Used
Not Used
Petroglyphs
Not Used
Not Used
Types of Porphyry and Amphibolite
Some rocks according to their use or texture are classified into different types. Know more about Porphyry Texture and Amphibolite Texture. Types of Porphyry are Rhomb Porphyry whereas the types of Amphibolite are Hornblendite.During historic times, some rocks depending on their hardness were used to create Pictographs and Petroglyphs. Rocks which are hard were generally not used. Pictographs are paintings or drawings that have been placed or created on the surface of rock. Porphyry and Amphibolite were not used for creating pictographs. Petroglyph is an image which is carved into a rock. These are images created by removing part of a rock surface by incising, picking, carving or abrading, as a form of rock art. Porphyry and Amphibolite were not used for creating petroglyphs.