Porphyry and Hornfels Types and Facts

Porphyry

Hornfels

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1 Types

1.1 Types

Rhomb Porphyry

Biotite hornfels

1.2 Features

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

Smooth to touch

1.3 Archaeological Significance

1.3.1 Monuments

Used

1.3.2 Famous Monuments

Data Not Available

1.3.3 Sculpture

Used

Not Yet Used

1.3.4 Famous Sculptures

Data Not Available

Not Applicable

1.3.5 Pictographs

Not Used

Used

1.3.6 Petroglyphs

Not Used

Used

1.3.7 Figurines

Used

Not Yet Used

1.4 Fossils

Absent

Types of Porphyry and Hornfels

Some rocks according to their use or texture are classified into different types. Know more about Porphyry Texture and Hornfels Texture. Types of Porphyry are Rhomb Porphyry whereas the types of Hornfels are Biotite hornfels.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 was not used to create pictographs whereas Hornfels is used to create 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 was not used to create petroglyphs whereas Hornfels was used to create petroglyphs.