Andesite and Anorthosite Types and Facts

Andesite

Anorthosite

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1 Types

1.1 Types

Icelandite

Proterozoic Anorthosite and Archean Anorthosite

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

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

Not Applicable

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 Anorthosite

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