The Sahara was ‘green’ for over 6,000 years and had 10 times more rain than now


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Based on erosion marks, several researchers and geologists have suggested that the Great Sphinx was built thousands of years earlier than the official story suggests.

According to a new study recently published in the journal Science Advances, evidence shows that humans occupied much of the Sahara during the ‘wet period’ around 8,000 years ago.

Through an analysis of marine sediments, researchers at the University of Arizona have determined rainfall patterns in the Sahara over a period of 6,000 years obtaining fascinating results. The UA-led team has identified the climate pattern that generated a “Green Sahara” from 5,000 to 11,000 years ago. The region had 10 times the rainfall it does today.

As it turns out, what is now the Sahara Desert was the home of hunter-gatherers who lived off the animals and plants present in the savannas of the region and off the wooded prairies sometime between 5,000 and 11,000 years ago.

“It was 10 times as wet as today,” said lead author Jessica Tierney of the University of Arizona. Annual rainfall in the Sahara now ranges from about 4 inches to less than 1 inch (100 to 35 mm).

Although other research has already identified the existence of a “Green Sahara” period, Tierney and colleagues managed to compile a continuous record of rainfall in the region that existed 25,000 years ago.

Interestingly, archaeological evidence shows that humans occupied much of the Sahara during the wet period, but gradually withdrew some 8,000 years ago.

Other researchers have suggested that the Sahara became drier by the time people left, but the evidence was inconclusive, says Tierney, an assistant professor of geosciences at the UA, whose work was published in Science Advances.


The Sahara Desert is the warmest in the world and the third largest after Antarctica and the Arctic.

According to the new study, rainfall records gathered by the team indicate a period that lasted for one thousand years, some 8,000 years ago, in which the Sahara became drier, which coincides with the time when people left.

“It looks like this thousand-year dry period caused people to leave,” Tierney said.

“What’s interesting is the people who came back after the dry period were different — most raised cattle. That dry period separates two different cultures. Our record provides a climate context for this change in occupation and lifestyle in the western Sahara.”

According to UA News, Instead of lake sediments, Tierney and her colleagues used cores of marine sediments taken off the coast of West Africa at four different sites. Because the cores were taken over a north-south distance of about 800 miles (1,300 km) — from offshore Cape Ghir, Morocco, to the northwestern corner of Mauritania — the cores revealed both the ancient rainfall patterns and the areal extent of the Green Sahara.


Source:

Green Sahara’s Ancient Rainfall Regime Revealed by Scientists

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Ivan

Ivan is editor-in-chief at ancient-code.com, he also writes for Universe Explorers. You may have seen him appear on the Discovery and History Channel.

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  1. Milankovitch cycles, people. We are only beginning to understand it all. And unless we “write it in stone” all our knowledge will disappear, too. We got clues to the ancients writing about these cycles when the Hindus wrote about the cycle of destruction then renewal… the Northmen about the warmth then Ragnarok.. This is MHO anyway

  2. I find this easy to believe as the Nile River drainage plain takes in (or took in) drainage all over central and Eastern Sahara. I’m no scientist but looking today at how massive the Nile Delta is and what vast amounts of sediment must be present there, it just tells me that the area must’ve been wet to erode all that sand and sediment and deposit it into the Mediterranean Sea.
    Look at the Mississippi River Delta that makes up most of Louisiana in the U.S….that system drains a large part of the United States from the Rockies to the Appalachian Mountain ranges and the amount of silt and sand that river has been depositing into the Gulf Of Mexico over millennia is unbelievably massive.
    Therefore, is it so far-fetched that the Sahara was once wet with enough runoff to form the Nile Delta as in the Mississippi Delta?

  3. It was tropical rainforest type weather 10000 years ago and then the Poles shifted in a massive catastrophe that destroyed the world at that time and all the advanced people perish along with their knowledge. If you want more info then read my book “We Are Our Ancestors” chapter eight. Richard.

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