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
Famous quotes containing the words dating, impact and/or event:
“We go on dating from Cold Fridays and Great Snows; but a little colder Friday, or greater snow would put a period to man’s existence on the globe.”
—Henry David Thoreau (1817–1862)
“Television does not dominate or insist, as movies do. It is not sensational, but taken for granted. Insistence would destroy it, for its message is so dire that it relies on being the background drone that counters silence. For most of us, it is something turned on and off as we would the light. It is a service, not a luxury or a thing of choice.”
—David Thomson, U.S. film historian. America in the Dark: The Impact of Hollywood Films on American Culture, ch. 8, William Morrow (1977)
“The awakening of the people of China to the possibilities under free government is the most significant, if not the most momentous, event of our generation.”
—Woodrow Wilson (1856–1924)