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Siltstone and Porphyry Types and Facts


Porphyry and Siltstone Types and Facts


Types

Types
Not Available   
Rhomb Porphyry   

Features
Available in Lots of Colors and Patterns, Easily splits into thin plates, Generally rough to touch, High silica content, Very fine grained rock   
Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Used   

Famous Monuments
Not Applicable   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Used   
Used   

Fossils
Present   
Absent   

Formation >>
<< Uses

Types of Siltstone and Porphyry

Some rocks according to their use or texture are classified into different types. Know more about Siltstone Texture and Porphyry Texture. Types of Siltstone are Not Available whereas the types of Porphyry are Rhomb Porphyry.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. Siltstone and Porphyry 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. Siltstone and Porphyry were not used for creating petroglyphs.

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