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PIETRA DI COGNE<br />

Roccia metamorfica gneiss albitica grigia, ricca<br />

di quarzo e feldspati. Originaria della vallata<br />

di Cogne, si forma a notevole profondità a<br />

causa di cambiamenti nella pressione e nella<br />

temperatura della crosta terrestre.<br />

Grey albititic metamorphic gneiss containing<br />

large amounts of quartz and feldspars. Quarried<br />

in the Cogne valley, it forms at considerable<br />

depths due to variations in the pressure and<br />

temperature of the earth’s crust.<br />

Gneiss métamorphique albitique gris, riche en<br />

quartz et en feldspaths. Originaire de la vallée de<br />

Cogné, il se forme à une profondeur remarquable<br />

à cause des changements de pression et de<br />

température de la croûte terrestre.<br />

Ein metamorpher Albit-Gneiss, grau und reich<br />

an Quarz und Feldspat. Er stammt aus dem<br />

Cogne-Tal in Italien und wird in großer Tiefe in<br />

Folge von Veränderungen der Temperatur- und<br />

Druckbedingungen der Erdkruste gebildet.<br />

Roca metamórfica albítica gris, rica de cuarzo<br />

y de feldespato. Procedente del valle de Cogne,<br />

se forma a mucha profundidad debido a los<br />

cambios en la presión y en la temperatura<br />

de la costra terrestre.<br />

a spacco<br />

62

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