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Tuff
Tuff

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Chert



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Tuff and Chert Types and Facts

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1 Types
1.1 Types
Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.
Flint, Jasper, Radiolarite, Common Chert, Chalcedony, Agate, Onyx, Opal, Magadi-type Chert, Porcelanite, Siliceous Sinter
1.2 Features
Always found as volcanic pipes over deep continental crust
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate
1.3 Archaeological Significance
1.3.1 Monuments
Used
Used
1.3.2 Famous Monuments
Easter Island in the Polynesian Triangle, Pacific Ocean
Data Not Available
1.3.3 Sculpture
Used
Not Yet Used
1.3.4 Famous Sculptures
Data Not Available
Not Applicable
1.3.5 Pictographs
Used
Not Used
1.3.6 Petroglyphs
Used
Not Used
1.3.7 Figurines
Used
Not Yet Used
1.4 Fossils
Absent
Present

Types of Tuff and Chert

Some rocks according to their use or texture are classified into different types. Know more about Tuff Texture and Chert Texture. Types of Tuff are Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite. whereas the types of Chert are Flint, Jasper, Radiolarite, Common Chert, Chalcedony, Agate, Onyx, Opal, Magadi-type Chert, Porcelanite, Siliceous Sinter.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. Tuff was used to create pictographs whereas Chert is not 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. Tuff was used to create petroglyphs whereas Chert was not used to create petroglyphs.

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