Selenizza is a naturally occurring solid hydrocarbon bitumen found in the native asphalt deposit of Selenice, in Albania, the only European asphalt mine still in use. The rock asphalt is found in the form of veins, filling cracks in a more or less horizontal direction. The bitumen content varies from 83% to 92% (soluble in carbon disulphide), with a penetration value near to zero and a softening point (ring & ball) around 120 °C. The insoluble matter, consisting mainly of silica ore, ranges from 8% to 17%. COUNT 5
QSN1 To what location is Selenizza bitumen native? ANS1 Selenice, in Albania QSN2 What is it about the mine that is unusual? ANS2 still in use QSN3 In what way is Selenizza bitumen geologically different than bitumen found in sands?  ANS3 rock asphalt QSN4 What is the variance in bitumen content rock asphalt? ANS4 83% to 92% QSN5 How is the rock asphalt mainly found? ANS5 veins