Diaspora from Tigris-Euphrates Persian Gulf Valley 8,000 BC
When the Last Glacial Maximum ended and after the hiccup (the Younger Dryas) the ice caps melted raising sea level 120 meters. In the End Note of Post 25, I calculated 10 million cubic miles of meltwater was needed to raise sea level that much.
All that meltwater did not reach the sea directly, as much pooled in “temporary” lakes as it flowed downhill to the sea. As the Laurentide Ice Sheet melted, Lake Agassiz was one of those lakes that was held back by an ice dam until the dam melted and outburst-flooded into the North Atlantic and brought about the 8.2 KYA Event. Many of the “temporary” lakes have lasted up to the present, and some of these are drying up at present.
Of great factual interest to my current novel, I would like to know the aridification timeline of those great flood plains (most accurately described today as deserts) of Northeast and Southeast Iran. It’s clear from maps, and especially from satellite maps, that these plains certainly would have accumulated glacial meltwater and become shallow lakes during the Holocene Wet Phase (7500–7000 BC to 3500–3000 BC) and would have supported substantial Neolithic tribes contemporaneous with the Ubaid and early Uruk culture (6500 to 3500 BC) in southern Mesopotamia.
The existence of these tribes at those lakes coeval with the early Uruk period is very important to where I am in writing my novel. It’s no surprise the archaeology of these dry lakes is slim to none, given this territory is in Iran and, as was the Arabian Peninsula until recent decades, virtually inactive in Neolithic (or any) archaeology other than Islamic.
I need insight into this subject, and there is evidence that such large lakes existed in these deserts up to now. I will present two such lakes: Lake Urmia in northern Iran and Bakhtegan Lake in Southern Iran with its often joined-at-the-hip Lake Tashk. There surely were others, and these were much larger during the Wet Phase.
Considering the likelihood of huge salt or sweet water lakes and more humidity in Southern Iran, I suspect the diaspora of pastoral tribes from 8000 BC to 6000 BC from the Tigris-Euphrates Persian Gulf Valley would have also spilled onto those Southern Iranian lake shores in the Wet Phase, and not just into the Iranian highlands. And that’s what I shall assume in writing my current novel. QED.
Another resource to supplement the above is this map of major known Neolithic sites stretching from southern Iran through Mehrgarh into the Indus Valley. The map maker, John C. Huntington, notes the scarcity of archaeological activity in Afghanistan.
Thanks for visiting,
R. E. J. Burke