Sea level has been rising for a very, very long time.
From Earth.com, July 25:
Much of Earth’s ancient past lies beneath the sea. Professor Jerome Dobson of the University of Kansas coined the term “aquaterra” to describe now-submerged lands once inhabited by early humans who used them to migrate. These regions vanished as sea levels rose after the last ice age.
In collaboration with Giorgio Spada of the University of Bologna and Gaia Galassi from the University of Urbino, Dobson examined these landscapes using an advanced sea-level reconstruction model.
The researchers tracked human migration patterns between Africa and Eurasia over the past 30,000 years, focusing on coastal corridors, especially across Egypt and the Red Sea region.
Reconstructing ancient shorelines
The team’s method involved Glacial Isostatic Adjustment (GIA) models, which simulate how Earth’s crust responds to glacial melting and sea-level changes.Using the SELEN4 model, they reconstructed ancient coastlines with accuracy, including transitions around the Mediterranean, Red Sea, and Nile Valley.
Their findings reveal that over 11 percent more land existed at the Last Glacial Maximum (LGM) than today. This exposed land formed crucial migration bridges.
Dobson emphasized, “We hope this enables people to see and explore the landscapes that were exposed during the last ice age.”
Paths early humans once traveled
Maps generated from their study reveal several alternative routes into and out of Africa.These include a path from Foul Bay to the Nile River, the overland corridor across the Isthmus of Suez, the Gulf of Aqaba passage leading to the Levant, the Bab el-Mandeb crossing into Arabia, and the sea routes through the Sicily and Messina Straits.
Genetic analysis supports several of these paths. Wohns et al. (2022) mapped ancient DNA lineages, revealing strong ancestral roots near Meroë in Sudan. Archaeological evidence remains scarce in some areas, perhaps due to submersion....
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"Global Warming, It’s Always a Shore Thing"
Cute title. I was going to try to get even cuter with "On this day in history, Jericho founded 9600 B.C.", the joke being that no one knows when/what day Jericho was founded, just that it's been around for a long, long time.
The history of all hitherto existing society is the history of global warming.
Biologically speaking, human beings may have emerged 200,000 years ago. Geographically speaking, they apparently spread to cover the entire Old World of Afro-Eurasia some 50,000 years ago. But socially speaking, our paleolithic progenitors didn’t amount to much. It may have taken a dozen ancient hunters working together to bring down a woolly mammoth, but you don’t have to be very social to organise a hunt. Just ask the English.
You can only hunt and gather your way so far down the road to civilisation, and that’s not very far. Meaningful human society only becomes possible when people put down roots and put up walls. The anthropology profession may not like to hear that, but Bruce Pascoe gets it. You can’t claim native title to “no fixed address”.
The earliest known permanent human settlement is Jericho, whose own walls famously fell to the blows of rams’ horns. The first village at Jericho is believed to date from around 9600 BC. It’s probably no coincidence that 9600 BC is also the conventional date given for the end of the last Ice Age. As the glaciers retreated, the truly big game got scarce, and people switched from hunting mammoth to herding sheep. Sheep’s wool turned out to be much more spinnable than mammoth wool, mothers starting knitting baby boots, and the rest is, well, history.
It is just possible that human society got its start in Jericho, smack in the middle of the land that God would later promise to Abraham and Moses. (God may be “infinite, eternal, and unchangeable in his being, wisdom, power, holiness, justice, goodness, and truth”, but no one ever said He was fair.) Soon after the death of Moses, Joshua led the ancient Israelites into Canaan, and Jericho was the first city to go. The Israelites “utterly destroyed all that was in the city, both man and woman, young and old, and ox, and sheep, and ass, with the edge of the sword”. Joshua went on to flatten Ai, Makkedah, Libnah, Lachish, Eglon, Debir and Hazor, but it’s Jericho that gets all the press.
Jericho lies 850 feet below sea level, but it is a mere forty miles from the sea. If it weren’t for the intervening hills, it would be completely swamped by water from the Mediterranean. In fact, it has been suggested that the fabled walls of Jericho were actually flood levees. But cut off as it was from Mediterranean trade, it seems more likely that ancient Jericho was a remote desert village than a bustling desert metropolis. For the first three thousand years of its settlement, Jericho didn’t even have pottery. If Joshua really did destroy “all that was in the city”, it may have been because there wasn’t much worth keeping.
As attractive as the Holy Land is to the holy, most reasonable people prefer to live by the sea. That was even more true in the ancient world than it is today. Until the coming of the railway, moving anything overland was hard work, with the sole exception of meat on the hoof. Inland life was fine if you were a shepherd watching over your flock by night. For everyone else, the ocean was where the action was.
But where was the ocean? Back in the glory days of prehistoric Jericho, sea level was 200 feet lower than it is today. That suggests that all the best neolithic city sites are probably now resting, undiscovered, under 200 feet of water. The world map looked very different ten thousand years ago. Albion didn’t become an island until 6100 BC. The Black Sea was a blue lake until 5600 BC. When archaeologists excavate neolithic settlements that are now on dry ground, they’re uncovering the remains of the uncouth mountain folk of deep antiquity. All the truly civilised cities probably went the way of Atlantis.
Sea level rose by an average of more than three feet for every century between 9000 and 4000 BC; it’s no wonder that every ancient culture has a flood story. The Bible’s flood story doesn’t say exactly where Noah lived, but the Epic of Gilgamesh gives a similar account of “the” flood, and Gilgamesh was the king of Uruk in what is now southern Iraq. He seems to have reigned around 2700 BC. Gilgamesh got the story from an old man named Utnapishtim who claimed to have actually lived through the flood. Fortunately for him (but unfortunately for us), Utnapishtim was immortal, so the fact that he was still alive to tell the story in 2700 BC doesn’t do much to fix the exact date.
Noah’s descendant Abraham washed up in Ur sometime around 2000 BC. Ur was then on the shore of what is now the Persian Gulf, some fifty miles to the south-east of Uruk. Abraham would have heard the flood story first-hand from his great-great-great-great-great-great-great grandfather Shem, who lived to be 500 years old. Shem was a young man of ninety-eight when his father Noah rounded up his family and loaded them on the ark. That places the biblical flood sometime around 2400 BC, more than two centuries after the reign of Gilgamesh. Maybe it was a different flood.
Either way, it seems a safe bet that amidst all the floods of the neolithic Middle East, “the” flood took place somewhere around the Persian Gulf. The flood story may be an almost historical memory of a catastrophic tidal wave that hit Mesopotamia in the 2000s BC. That’s the romantic view. Or it might be a much dimmer memory of the slowly rising sea levels that submerged some of the primest real estate of the neolithic world way back between the 8000s and 6000s BC.
The oldest known city site in Mesopotamia, Eridu, dates from 5400 BC and is just a few miles from Ur—that is, the ancient coastline. Ironically, despite the ensuing rise in sea level, Ur and Eridu are now stranded some 150 miles inland. Salt water initially inundated the flat, marshy plains of southern Mesopotamia, but then sediment from the Tigris-Euphrates river system built the land back up again. The net result is that any earlier cities that might once have dotted the shores of the ancient Persian Gulf would now lie 150 feet under the muds of Basra....
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Bring on the scuba-diving antiquarians/archaeologists/treasure hunters.
It is easy to forget just how long some of these places have been around. And how in geological terms it's all just the blink of an eye.
