Types of Pyrolite and Banded iron formation
Some rocks according to their use or texture are classified into different types. Know more about Pyrolite Texture and Banded iron formation Texture. Types of Pyrolite are Dunite, Wehrlite, Harzburgite, Lherzolite whereas the types of Banded iron formation are Algoma-type , Lake Superior-type, Superior-type and Taconite.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. Pyrolite was used to create pictographs whereas Banded iron formation is not 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. Pyrolite was used to create petroglyphs whereas Banded iron formation was not used to create petroglyphs.