Andesite and Tonalite Types and Facts

Andesite

Tonalite

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1 Types

1.1 Types

Icelandite

Dacite

1.2 Features

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

Is one of the oldest rock, Typically speckled black and white.

1.3 Archaeological Significance

1.3.1 Monuments

Used

Not Yet Used

1.3.2 Famous Monuments

Middle of the Earth in Ecuador

Not Applicable

1.3.3 Sculpture

Used

1.3.4 Famous Sculptures

Data Not Available

1.3.5 Pictographs

Not Used

1.3.6 Petroglyphs

Not Used

1.3.7 Figurines

Used

1.4 Fossils

Absent

Types of Andesite and Tonalite

Some rocks according to their use or texture are classified into different types. Know more about Andesite Texture and Tonalite Texture. Types of Andesite are Icelandite whereas the types of Tonalite are Dacite.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 Tonalite 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 Tonalite were not used for creating petroglyphs.