Trani (natural stone)
Trani (ital .: pietra tranese ) is a limestone , which in Italian Puglia northwest of Bari , near the town of Trani is mined. This natural stone was created in the Jura 140 million years ago.
Emergence
In the Jura, lime sludge and clays were deposited in what was then the Mediterranean , which were solidified over the course of millions of years. The overlying pressure caused the substances lime and clay to be shifted parallel to the layers to form serrated bands ( also called mouse teeth by stone masons), to the stylolites (also known as pressure sutures). This natural stone was created through diagenesis , compaction and cementation . This deposit was partially cemented until it was pore-free, because the cracks, small fissures and subsidence that resulted from the movement of the rock layers were filled with calcite . Inclusions of fossils are rare in Trani, and petrified algae can be seen from time to time.
Rock description
The fine-grained beige to gray or creamy pink to pink natural stone is clearly structured by wavy and jagged tone veins, by stylolites. Veins can also be filled with calcite and can then be polished. The rock layers of this deposit show a clear storage and the colors and structures vary slightly depending on the layer position in the quarry.
The Trani Serpeggiante (serpeggiante = serpentine), which is light brown to beige and characterized by wavy ribbons, is obtained in certain layers . The Trani Fiorto (fiorito = flowered) is extracted from the other layers .
Since these types of stone can be polished, they are also known as marbles in the usual trade .
use
Trani can be polished, is not acid and frost resistant. Due to its strength, this limestone is relatively weatherproof, provided it is not exposed to frost. The polish on the outside decreases with weathering. Today it is mainly used for floor and stair coverings as well as window sills in the interior of buildings, interior wall cladding, but also in bathrooms as bathtubs, washstands and design objects. This natural stone is processed in Italy and throughout Europe.
The cathedral of San Nicola Pellegrino in Trani , other historical buildings and sculptures are made of this stone. Sculptors worked in medieval Trani, such as Barisanus von Trani in the middle of the 12th century, who created the famous bronze doors of the cathedral in Trani. But even today sculptors make sculptures from this natural stone.
Individual evidence
- ↑ Karlfried Fuchs: Natural stones from all over the world, discover, determine, use. Sheet 167. Vol. 2. Munich (Callwey) 1997, ISBN 3-7667-1267-5
- ^ Ekkehart Rotter: Apulia . Trips to Byzantine grotto churches, Norman cathedrals, Hohenstaufen forts and baroque buildings in Lecce. (= DuMont art travel guide ). 6th edition. Dumont Reise Verlag, Ostfildern 2012, ISBN 3-7701-4314-0 . , P. 151.
Coordinates: 41 ° 15 ′ 12.9 " N , 16 ° 21 ′ 46.3" E