Corsi Collection of Decorative Stones

view of stone 693

Corsi 693, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 693  
Name and quarry location: Breccia di Roma, from Rome, Lazio, Italy  
Geological description: Polymict conglomerate with extensively fractured clasts. These are predominantly limestone; a few are red in colour. Some show 'paesination' - microfracture constrained patterns of ironstaining like pietra paesina, and these also have a rich microfauna. The matrix is calcarenite.  
Comments: Matrix may be quartz grains cemented with calcite. Similar to, but more Fe-rich than no. 691.  
Further information:

Corsi's classification: Class 10. Pudding-stones; ii. Italian pudding-stones  
Corsi's text: 165.11 Breccia di Roma  

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