Porphyry and Andesite Types and Facts

Porphyry

Andesite

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1 Types

1.1 Types

Rhomb Porphyry

Icelandite

1.2 Features

Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny

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

1.3 Archaeological Significance

1.3.1 Monuments

Used

1.3.2 Famous Monuments

Data Not Available

Middle of the Earth in Ecuador

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 Porphyry and Andesite

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