Corsi Collection of Decorative Stones

view of stone 38

Corsi 38, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 38  
Name and quarry location: Marmo scuro di Trento, from Trent, Trentino-Alto Adige, Italy (not confirmed)  
Geological description: Biomicrite limestone densely packed with tests of foraminifera and other plankton, with calcite-filled veins and (on the sides of the specimen) dendrites of black manganese oxides. The whole stone has ferruginous staining constrained by the fracture pattern.  
Comments: The distribution of the iron-staining is analogous to that of pietra paesina (ruin marble), but this is a rather coarser-grained limestone.  
Further information:

Corsi's classification: Class 1. Marbles; Section 1. Monochrome marbles; Species 3. Yellow marbles ii. Yellow marbles of Italy  
Corsi's text: 31.4 Marmo scuro di Trento  

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