Corsi Collection of Decorative Stones

view of stone 291

Corsi 291, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History

OUMNH Number: 291  
Name and quarry location: A hybrid of mischio scuro di Lugo/lumachella di San Vitale and astracane di Verona, from Lugo di Grezzana, Val Pantena, Verona, Veneto, Italy  
Geological description: Limestone; a fossiliferous micrite parts of the specimen rich in bivalve fragments, and other parts containing elongate spar-filled sections of the the lower Jurassic 'Lithiotis' bivalve. It is crossed by a thick calcite-filled vein.  
Comments: This is an example of lumachella di San Vitale, a Lower Jurassic limestone containing the elongate sparry calcite-filled shells of the reef-forming bivalve Lithiotis. It is named after the village of San Vitale di Roverè, a source cited by both Pollini (1817, 1825) and Jervis (1889), but was also obtained from Lugo and other locations in the Anguilla, Squaranto and Pantena valleys of Verona, as well as other places to the north and east. It clearly grades into the shelly limestone known as lumachella di Verona or astracane di Verona (see nos.224, 225), obtained from near Grezzana and other locations. The painted number on the back of the specimen also confirms a Verona/Vicenza provenance (see Verona.pdf for more information).  
References: Antonelli (2003); Fraser (2004); Jervis (1889) 144; Price (2007) 168  
Further information: Verona.pdf

Corsi's classification: Class 1. Marbles; Section 3. Lumachellas; ii. Italian lumachellas  
Corsi's text: 88.59 Mischio scuro di Lugo  

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