Tachylite and Porphyry Types and Facts

Types of Tachylite and Porphyry

Some rocks according to their use or texture are classified into different types. Know more about Tachylite Texture and Porphyry Texture. Types of Tachylite are Volcanic glass 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. Tachylite and Porphyry were 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. Tachylite and Porphyry were for creating petroglyphs.