Andesite and Gneiss Types and Facts

Andesite

Gneiss

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1 Types

1.1 Types

Icelandite

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

1.2 Features

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

Generally rough to touch, Is one of the oldest rock

1.3 Archaeological Significance

1.3.1 Monuments

Used

1.3.2 Famous Monuments

Middle of the Earth in Ecuador

Konark Sun Temple in India, Washington Monument, US

1.3.3 Sculpture

Used

Not Yet Used

1.3.4 Famous Sculptures

Data Not Available

Not Applicable

1.3.5 Pictographs

Not Used

1.3.6 Petroglyphs

Not Used

1.3.7 Figurines

Used

Not Yet Used

1.4 Fossils

Absent

Types of Andesite and Gneiss

Some rocks according to their use or texture are classified into different types. Know more about Andesite Texture and Gneiss Texture. Types of Andesite are Icelandite whereas the types of Gneiss are Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss..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 Gneiss were not used 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 Gneiss were not used for creating petroglyphs.