Corsi Collection of Decorative Stones

view of stone 957

Corsi 957, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 957  
Name and quarry location: Pietra paesina, from Trent, Trentino-Alto Adige, Italy  
Geological description: Heavily fractured micritic limestone with abundant tiny bioclasts. Ferruginous staining shows typical Liesegang rings, and is constrained by sealed microfractures giving the 'paesina' effect seen best on sides of sample. Dendritic manganese oxides emanate from fractures. It is almost certainly from the Cretaceous to Eocene Alberese Formation.  
Comments: This sample is unlikely to be from Trento. Pietra paesina occurs in various locations of Italy, of which Valdarno, outside Florence, is the best known.  
References: Marko (2003); McBride (2003); Price (2007) 101-103  
Further information:

Corsi's classification: Class 1. Marbles; Section 6. Argillaceous stones; ii. Dendritic clays  
Corsi's text: 130.13 /S20.2 Paesina di Trento  

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