Tuff and Siltstone Types and Facts

Tuff

Siltstone

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Types

Features

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.

Always found as volcanic pipes over deep continental crust

Easter Island in the Polynesian Triangle, Pacific Ocean

Absent

Siltstone

Available in Lots of Colors and Patterns, Easily splits into thin plates, Generally rough to touch, High silica content, Very fine grained rock

Present

Types of Tuff and Siltstone

Some rocks according to their use or texture are classified into different types. Know more about Tuff Texture and Siltstone Texture. The types of Tuff and Siltstone are .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 and Siltstone 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. Tuff and Siltstone were for creating petroglyphs.