Meteor Crater,Arizona. It is also called the Barringer Crater,after the mining engineer who first suggested that it was formed by a meteor impact. It is about 50,000 years old and is about 200 meters deep and 800 meters across. Several attempts to mine the iron- rich material of the meteor were made before a visitor center was built in the 1960s. Two new minerals - coesite and stishovite - were identified here; both are forms of silica created at high temperatures and pressures. In recent years the crater has been used for astronaut training and studies in planet comparison | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NYPL / Science Source |
Bildgröße: | 4300 px × 2632 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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