Shale and Basanite Types and Facts
Types
Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale
Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite
Features
Easily splits into thin plates, Generally rough to touch, Very fine grained rock
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate, Used as a touchstone
Archaeological Significance
Famous Monuments
Jantar Mantar in India
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Types of Shale and Basanite
Some rocks according to their use or texture are classified into different types. Know more about Shale Texture and Basanite Texture. Types of Shale are Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale whereas the types of Basanite are Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite.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. Shale and Basanite 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. Shale and Basanite were for creating petroglyphs.