2.28 Kilo (5#) Superb Row Fossilized Shockwaves Sudbury Shatter Cones Impactite For Sale
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2.28 Kilo (5#) Superb Row Fossilized Shockwaves Sudbury Shatter Cones Impactite:
$31.01
2.28 Kilo (5#) Superb Row Fossilized Shockwaves Sudbury Shatter Cones Impactite Description
Our SKU: 10016930
Item Brand: Unbranded
Item MPN:
According to Wikipedia: "Shatter cones are rare geological features that are only known to form in the bedrock beneath meteorite impact craters or underground nuclear explosions. They are evidence that the rock has been subjected to a shock with pressures in the range of 2-30 GPa." Long after a meteorite impact crater has disappeared from the landscape, "impactites" may yet remain. These are frequently often quite distinctive varieties of Earth materialaffected, sometimes profoundly so, by an impact from an asteroid or a comet much more violent than any volcanic eruption, tsunami, earthquake or even an atomic bomb blast. One large kind of impactite, easily seen with the unaided eye, is known as a "shatter cone" such as the specimen being offered here for your very kind consideration. Specifically, here is a remarkable long row of SUDBURY SHATTER CONES containing rows of quite obvious features caused by immense shock that look a lot like "horsetail structures." If fulgarites are "fossilized lightning," these are without question "fossilized shockwaves". Robert S. Dietz, who pioneered the concept of seafloor spreading, was the first person to make the now confirmed connection between impact craters and shatter cones such as the ones offered here. It was Dietz who proved Sudbury, Ontario, Canada was the site of an ancient impact that had ocurred nearly 1.86-billion (1.86 thousand-million) years ago. This specimen weighs 2.279-kilograms (five-pounds) and is shaped like a triangular prism, 27.5 x 11.0 x 10.0-cm (10 3/4 x 4 1/4 x 4-inches). The brass one-cm cube, about 3/8-inches, is not included. Several things make this specimen unique. There are signs of shock on both sides. This specimen sports a lovely series of flattened shatter cone (indeed, most Sudbury shatter cones are similarly flattened). Its cone-shapes with lines radiation outward from the narrow ends are evident even without sidelighting. It is relatively fresh, free from blackening caused by over one hundred years of sulphor dioxide pollution from local mining. And, the dark reddish rocktype in which the shock is imprinted is part of the Canadian Shield which solidified roughly 2.5-billion (2.5-thousand million) years ago, a making it among the oldest exposed rocks in the world. The Sudbury impact crater is the second-oldest and second largest confirmed impact crater in the world.
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