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Humans may have migrated out of Africa in phases based on the weather
Past Horizons ^ | February 21, 2015 | editors

Posted on 02/24/2015 2:49:57 AM PST by SunkenCiv

Parton and colleagues writing in Geology, present a unique alluvial fan aggradation record from southeast Arabia spanning the past approx. 160,000 years. Situated along the proposed southern dispersal route, the Al Sibetah alluvial fan sequence provides a unique and sensitive record of landscape change in southeast Arabia. This record is to date the most comprehensive terrestrial archive from the Arabian Peninsula, and provides evidence for multiple humid episodes during both glacial and interglacial periods.

Evidence from the Al Sibetah alluvial fan sequence indicates that during insolation maxima, increased monsoon rainfall led to the widespread activation of drainage systems and grassland development throughout regions that were important for the dispersal of early human populations.

Previously, the timing of episodes of increased humidity was largely linked to global interglacials, with the climate of Arabia during the intervening glacial periods believed to be too arid to support human populations. Parton and colleagues suggest, however, that periods of increased rainfall were not driven by mid-high latitude deglaciations every ~100,000 years, but by periods of maximum incoming solar radiation every ~23,000 years.

(Excerpt) Read more at pasthorizonspr.com ...


TOPICS: History; Science; Travel
KEYWORDS: africa; alsibetah; arabia; godsgravesglyphs; multiregionalism
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Map showing location of the study site and extent of bajada system in southeast Arabia, including other identified sections of the Al Ain fan (UAE—United Arab Emirates). Image: Parton et al

Map showing location of the study site and extent of bajada system in southeast Arabia, including other identified sections of the Al Ain fan (UAE—United Arab Emirates). Image: Parton et al

1 posted on 02/24/2015 2:49:57 AM PST by SunkenCiv
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To: SunkenCiv

Really interesting. Thanks for posting.


2 posted on 02/24/2015 3:25:53 AM PST by Natufian (t)
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To: Natufian

My pleasure!


3 posted on 02/24/2015 4:17:39 AM PST by SunkenCiv (What do we want? REGIME CHANGE! When do we want it? NOW!)
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To: StayAt HomeMother; Ernest_at_the_Beach; decimon; 1010RD; 21twelve; 24Karet; 2ndDivisionVet; ...

4 posted on 02/24/2015 4:20:26 AM PST by SunkenCiv (What do we want? REGIME CHANGE! When do we want it? NOW!)
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To: SunkenCiv

Based on the fact that the rest of the world’s humans of the past are decidedly ‘different’ than ‘Africans’...

...perhaps they migrated out of Africa for much more mundane reasons.

Ya know???


5 posted on 02/24/2015 4:30:50 AM PST by logi_cal869 (-cynicus-)
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To: logi_cal869

Like because it was HOT???


6 posted on 02/24/2015 4:54:41 AM PST by Quality_Not_Quantity (Liars use facts when the truth doesn't suit their purposes.)
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To: SunkenCiv
So human migrations were set in motion by a 23,000 year cycle of solar radiation. It's fascinating that this period is about one-sixth of the time it took humans to migrate out of Africa. If the solar cycle could influence global atmospheric humidity and glaciation that much, the why all the ado about human-forced climate change today? Man obviously adapted before when he had about zero ability to do so other than walking a few tens of miles to a new location to hunt and gather food.
Previously, the timing of episodes of increased humidity was largely linked to global interglacials, with the climate of Arabia during the intervening glacial periods believed to be too arid to support human populations. [Now] Parton and colleagues suggest, however, that periods of increased rainfall were not driven by mid-high latitude deglaciations every ~100,000 years, but by periods of maximum incoming solar radiation every ~23,000 years.

7 posted on 02/24/2015 5:36:25 AM PST by ProtectOurFreedom (For those who understand, no explanation is needed. For those who do not, no explanation is possible)
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To: logi_cal869

They were pining for the fjords. Unfortunately they didn’t know that Norway was north, not east.


8 posted on 02/24/2015 6:44:54 AM PST by Verginius Rufus
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To: logi_cal869

They were pining for the fjords. Unfortunately they didn’t know that Norway was north, not east.


9 posted on 02/24/2015 6:44:54 AM PST by Verginius Rufus
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To: Quality_Not_Quantity

The climate wasn’t like that until long after the migration began.

What I find amusing about so-called ‘scientific’ research about the ‘migration out of Africa’ is that it ignores, ostensibly for PC reasons, the fact that those that migrated were decidedly ‘different’ than those who remained.

Telling, imho.


10 posted on 02/24/2015 6:46:21 AM PST by logi_cal869 (-cynicus-)
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To: Quality_Not_Quantity

And you can’t grow food in sand. Sam Kinison said it best: ...””Get out of the desert! You live in a ####ing desert! Nothing grows out here! Nothings gonna grow out here! Come here you see this huh? This is sand. You know what it’s going to be in another hundred years from now? It’s gonna be sand!...””


11 posted on 02/24/2015 6:56:56 AM PST by mcshot (I pray someone comes forth with the strength, fortitude and burning desire to save our Republic)
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To: Quality_Not_Quantity

#6 or maybe they were hungry.

Sam Kinison
https://www.youtube.com/watch?v=P0q4o58pKwA


12 posted on 02/24/2015 9:52:14 AM PST by minnesota_bound
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To: SunkenCiv

So we’re ALL African-Americans.....Reparations for Everyone!


13 posted on 02/24/2015 9:53:15 AM PST by dfwgator
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To: minnesota_bound

George Carlin on Global Warming
https://www.youtube.com/watch?v=BB0aFPXr4n4


14 posted on 02/24/2015 9:53:29 AM PST by minnesota_bound
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To: ProtectOurFreedom

/bingo


15 posted on 02/24/2015 11:55:48 AM PST by SunkenCiv (What do we want? REGIME CHANGE! When do we want it? NOW!)
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To: ProtectOurFreedom

And we haven’t been able to make that river in Arabia flow again, or stop flowing in the first place.


16 posted on 02/24/2015 11:56:22 AM PST by SunkenCiv (What do we want? REGIME CHANGE! When do we want it? NOW!)
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To: logi_cal869

“What I find amusing about so-called ‘scientific’ research about the ‘migration out of Africa’ is that it ignores, ostensibly for PC reasons, the fact that those that migrated were decidedly ‘different’ than those who remained.”

What is your source? I’ve tried to find something printed that backs this up. I found one but it was a Redneck, Religous, Racist sight and was very crudely written. In other words, that website does not like the scientific evidence put in front of them....


17 posted on 02/24/2015 12:13:06 PM PST by Snark
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To: SunkenCiv

They were looking for white chicks.


18 posted on 02/24/2015 12:16:50 PM PST by central_va (I won't be reconstructed and I do not give a damn.)
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To: Snark

Lol. Source?

So where did whites come from? Spontaneous albinism?

It’s just an amusing observation of mine that whites were alien to Africans when they ‘rediscovered Africa’...there’s probably some basis of fact to this, but who would actually fund a study of ancient reverse racism? A study that almost certainly would conclude that whites were cast out of Africa, not ‘migrated’...likely demonstrating that racism is rooted in those of color, not the converse.

That study just ain’t happenin’...


19 posted on 02/24/2015 12:30:36 PM PST by logi_cal869 (-cynicus-)
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To: logi_cal869

“It’s just an amusing observation of mine....”

Wow. Here I thought I was having a rational discussion.
As far as why white people are white, then you are actually closer with your statement “Spontanious albinism”. Humans have an amount of Melanin Pigment in our system. It protects us from the Suns radioactive Rays. The closer you are to the equator, the more melanin. As we scattered away from that area of Africa, we did not need as much melanin and it decreased making us whiter.
This is actually simple science that was proven long before they discussed everyone coming from Africa.

Maybe you should read that website I stumbled on. More your speed, I think.


20 posted on 02/24/2015 1:53:31 PM PST by Snark
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