Porphyry and Anorthosite Types and Facts

Porphyry

Anorthosite

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1 Types

1.1 Types

Rhomb Porphyry

Proterozoic Anorthosite and Archean Anorthosite

1.2 Features

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

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

Data Not Available

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 Porphyry and Anorthosite

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