Corsi Collection of Decorative Stones

view of stone 471

Corsi 471, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 471  
Name and quarry location: Breccia di Ponte Salaro, from Ponte Salaro, near. Rome, Lazio, Italy  
Geological description: Polymict limestone conglomerate with abundant nummulites, molluscan and other skeletal debris. It is extensively stylolitised. The micritic matrix has a rich microfauna. It has large areas of yellowish filler and brown areas around clasts are also filler.  
Comments: Ponte Salaro is a bridge over the Aniene near the point where it meets the Tiber, on the road Via Salaria linking Rome with the middle Adriatic Sea (from which the Romans obtained salt, hence the name). Corsi’s breccia di Ponte Salaro may have been the building stone. The bridge was destroyed by French troops in 1867 attempting to keep Garibaldi from the City of Rome. A nearby tower shown in a plate by Guiseppe Vasi in the 18th century does still stand, and a modern image suggests this may be a conglomerate.  
Further information:

Corsi's classification: Class 1. Marbles; Section 5. Breccias; ii. Italian Breccias  
Corsi's text: 123.50 Breccia di Ponte Salaro presso Roma  

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