Corsi Collection of Decorative Stones

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view of stone 678

Corsi 678, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 678  
Name and quarry location: Basalte di Bolsena, from Bolsena, Viterbo, Lazio, Italy  
Geological description: Metatuff with abundant quartz and hornblende crystals of varying size up to 2mm in a poorly sorted crystal-lithic matrix. Shows weakly defined flow-banding.  
Comments: Corsi's provenance is probably correct. Basalts and tuffs of the Pleistocene Vulsini volcanic complex form extensive deposits in the area of Lake Bolsena, Lazio, Italy. They are widely used as building stones in the area.  
References:  
Further information:
 


Corsi's classification: Class 9. Basalts; ii. Italian basalts  
Corsi's text: 161.3 Basalte di Bolsena  

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