Andesite and Slate Types and Facts
Types
Icelandite
Not Available
Features
Generally rough to touch, High silica content, Is one of the oldest rock
Easily splits into thin plates, Surfaces are often shiny, Very fine grained rock
Archaeological Significance
Famous Monuments
Middle of the Earth in Ecuador
Data Not Available
Famous Sculptures
Data Not Available
Data Not Available
Pictographs
Not Used
Used
Petroglyphs
Not Used
Used
Types of Andesite and Slate
Some rocks according to their use or texture are classified into different types. Know more about Andesite Texture and Slate Texture. Types of Andesite are Icelandite whereas the types of Slate are Not Available.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. Andesite was not used to create pictographs whereas Slate is used to create 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. Andesite was not used to create petroglyphs whereas Slate was used to create petroglyphs.