Lignite and Diabase Types and Facts

Types of Lignite and Diabase

Some rocks according to their use or texture are classified into different types. Know more about Lignite Texture and Diabase Texture. Types of Lignite are Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite whereas the types of Diabase are Dolerite.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. Lignite and Diabase 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. Lignite and Diabase were for creating petroglyphs.