Andesite and Novaculite Types and Facts
Types
Icelandite
Sedimentary rock
Features
Generally rough to touch, High silica content, Is one of the oldest rock
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate
Archaeological Significance
Famous Monuments
Middle of the Earth in Ecuador
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Types of Andesite and Novaculite
Some rocks according to their use or texture are classified into different types. Know more about Andesite Texture and Novaculite Texture. Types of Andesite are Icelandite whereas the types of Novaculite are Sedimentary rock.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 and Novaculite were 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. Andesite and Novaculite were for creating petroglyphs.