Andesite and Tuff Types and Facts

Andesite

Tuff

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Types

Features

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Icelandite

Generally rough to touch, High silica content, Is one of the oldest rock

Middle of the Earth in Ecuador

Absent

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

Types of Andesite and Tuff

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