Lignite and Travertine Types and Facts

Lignite

Travertine

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Types

Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite

Thermal Travertine and Tufa

Features

Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel

Stalactites and stalagmites are formed from this rock, Surfaces are often shiny, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Colosseum in Rome, Italy, Sacré Coeur in Paris, France, Trevi Fountain in Rome, Italy

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Types of Lignite and Travertine

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