Gneiss and Tuff Types and Facts

Gneiss

Tuff

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Types

Features

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss.

Generally rough to touch, Is one of the oldest rock

Konark Sun Temple in India, Washington Monument, US

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 Gneiss and Tuff

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