Dating The Impact Event
Fission-track analysis of glass fragments by Storzer suggested the Wabar impact took place thousands of years ago, but the fact that the craters have been filled-in considerably since Philby visited them suggests their origin is much more recent. Thermoluminescence dating by Prescott et al. (2004) suggest the impact site is no more than 260 years old. Arab reports of a fireball passing over Riyadh, variously reported as occurring in 1863 or 1891, indicate the impact may have occurred very recently. Fragments scattered from the path of this fireball match samples found at the Wabar site.
Read more about this topic: Wabar Craters
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