Anorthosite and Porphyry Types and Facts

Anorthosite

Porphyry

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1 Types

1.1 Types

Proterozoic Anorthosite and Archean Anorthosite

Rhomb Porphyry

1.2 Features

Generally rough to touch, Is one of the oldest rock

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

1.3 Archaeological Significance

1.3.1 Monuments

Not Yet Used

Used

1.3.2 Famous Monuments

Not Applicable

Data Not Available

1.3.3 Sculpture

Used

1.3.4 Famous Sculptures

Not Applicable

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 Anorthosite and Porphyry

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