Diamond and graphite, Tunguska

Diamond and graphite, Tunguska

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This image is part of the feature Tunguska 100th

Credit: SPUTNIK/SCIENCE PHOTO LIBRARY

Caption: Diamond and graphite accretions from the Tunguska site, light microscope image. In 1908 a large astronomical body exploded above Tunguska, Siberia, Russia. The energy released was equivalent to around 1000 times that of the Hiroshima atomic-bomb. Although there are many theories as to the type of body involved, one of the more credible, propounded by British astronomer Francis Whipple, is that it was a comet which exploded around 7.5 kilometres above the surface of the Earth. This mineral sample was taken from the site and was studied to help scientists understand the nature of the explosion.

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Keywords: black-and-white, carbon, comet, diamond, francis whipple, gem, gems, gemstone, gemstones, geological, geology, graphite, impact, krasnoyarsk, light microscope, meteorite, mineral, mineralogy, minerals, monochrome, novosti, rock, russia, tunguska

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