Rhyolite and Oil shale Types and Facts
Types
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.
  
Carbonate-rich Shale, Siliceous Shale and Cannel Shale
  
Features
Acidic in nature, Available in lots of colors
  
Easily splits into thin plates, Generally rough to touch, Is one of the oldest rock, Very fine grained rock
  
Archaeological Significance
  
  
Monuments
Not Yet Used
  
Not Yet Used
  
Famous Monuments
Not Applicable
  
Not Applicable
  
Sculpture
Not Yet Used
  
Not Yet Used
  
Famous Sculptures
Not Applicable
  
Not Applicable
  
Pictographs
Not Used
  
Not Used
  
Petroglyphs
Not Used
  
Not Used
  
Figurines
Not Yet Used
  
Not Yet Used
  
Fossils
Absent
  
Present
  
Types of Rhyolite and Oil shale
Some rocks according to their use or texture are classified into different types. Know more about Rhyolite Texture and Oil shale Texture. Types of Rhyolite are Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks. whereas the types of Oil shale are Carbonate-rich Shale, Siliceous Shale and Cannel Shale.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. Rhyolite and Oil shale 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. Rhyolite and Oil shale were not used for creating petroglyphs.