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travertine-limestone

travertine-limestone

SRI Petrography ID: 57

Roman travertine
Italy

Names

[de] Travertin Kalkstein
[en] travertine-limestone

Description

Travertine is a dense, banded sedimentary rock (limestone) composed of calcium carbonate, CaCO3. It is formed in cold or temperate surface or ground waters by rapid chemical precipitation of calcium carbonate (Calcite or Aragonite) from supersaturated solutions.
Speleothems (flowstones, stalagmites, stalaktites,...) are commonly composed of travertine, formed in caves or (large) fissures from supersaturated, cold waters.

Color

mostly light coloured and often white to grey, impurities causing different colours; iron oxides (brown, yellow, red) or carbon (blueish, grey, black).

Grain Size

fine grained

Texture

banded, often containing pores

Minerals

calcite, aragonite, containing detritic minerals, esp. clay, quartz, iron oxides

Occurences

various sites, e.g. Italy, Turkey, USA (Yellowstone), Slovenia, Croatia, etc.

Comments

Travertine is often used for walls and interior decorations in public buildings and as paving stone.

Classification

Class

SEDIMENTARY ROCKS

Broader Terms

carbonate sedimentary rocks

Narrower Terms

Austria-travertine-limestone

Germany-travertine-limestone

Greece-travertine-limestone

Hungary-travertine-limestone

Italy-travertine-limestone