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Alain Véron from the Paul Cézanne University in Aix-en-Provence, France, and colleagues made the discovery by measuring the variations in lead concentration in a mud core from Alexandria's ancient harbour. They determined how lead levels had changed over time by carbon-dating seashells found in the core.
Clear pulses of lead contamination occurred between 2686 and 2181 BC and then again from 1000 to 800 BC. The researchers conclude that these peaks were associated with human activities such as plumbing, fishing, building and ship-building. This is supported by ancient texts, which mention a settlement named Rhakotis existing around the same time Alexander would have arrived.
Originally posted by sy.gunson
It sounds like earthquakes then were in part to do with the fall of dynasties in old Egypt ?
No doubt we can assume tsunamis too. I wonder if anybody has ever thought to look inland for tsunamis debris fields from the Old kingdom ?
After 10 years of digging in Horus road, where remains of several military forts, granaries, dormitory and temples were found, Egyptian archeologists of the Supreme Council of Antiquities (SCA) came upon 20 pumice stones or solidified lava inside a pit at Tel Habuwa from Santorini Volcano which erupted in 1500 BC, killing 35,000 people and demolishing several coastal cities in southwest Turkey, Crete, north of the Saudi Arabia, Palestine and the Sinai.
The pumice, which was found among several 18th Dynasty clay vessels that date back to the Hyksos era, was probably brought to Sinai by a tsunami caused by the volcano.