Road sign for Barringer meteor crater, Arizona, USA

Numéro d’image : 12582830
Road sign for Barringer meteor crater, Arizona, USA
The Barringer meteor crater in northern Arizona is the best preserved impact crater on Earth, and was formed 49, 000 years ago. The largest known piece from this impact is the iron-nickel Holsinger meteorite, weighing 639 kilograms and measuring 0.9m long. It was found some 2.5 km north of the crater in 1911. Before entering the Earth's atmosphere it is estimated that the meteor was originally 1.186 km wide, and before hitting the ground lost approximately half of its mass burning up, the remaining part exploded and evaporated when it impacted in the ground. The meteorite hit the ground at a speed of 12.8 km per second with an impact force of approximately 2.5 megatons, 150 times more powerful than the Hiroshima atomic bomb. In 1903 Daniel Barringer suggested that the crater had been produced by the impact of a large iron-metallic meteorite, a theory confirmed by G Shoemaker in 1960.
Licence : Droits gérés
Crédit: Science Photo Library / Parker, David
Taille de l’image : 4386 px × 6572 px
Model Release : Non requis
Property Release : Non requis
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