Read the Beforeitsnews.com story here. Advertise at Before It's News here.

By Alton Parrish (Reporter)
Contributor profile | More stories

Story Views
Now:
Last hour:
Last 24 hours:
Total:

Global-Scale Geomagnetic Reversals And Failed Reversals Reveal Mans First Migrations Into China

Wednesday, August 15, 2012 12:44

% of readers think this story is Fact. Add your two cents.

Global-scale geomagnetic reversals, which are periods when the direction of Earth’s magnetic field flips, leave imprints in magnetic minerals present in sediments. But so do smaller-scale, even local, changes in Earth’s magnetic field direction. Paleomagnetists believe that the smaller-scale events represent “failed reversals” and refer to them as “geomagnetic excursions;” scientists use geomagnetic excursions in sedimentary basins as markers to tie together events of Earth’s history across the globe.

NASA computer simulation using the model of Glatzmaier and Roberts.The tubes represent magnetic field lines, blue when the field points towards the center and yellow when away. The rotation axis of the Earth is centered and vertical. The dense clusters of lines are within the Earth’s core

Credit: NASA

Ao et al. conducted high-resolution paleomagnetic measurements and mineralogical studies in paleolake sediments in the Nihewan Basin of northern China, which hosts two early hominid paleolithic sites, Feiliang and Lanpo. The authors identified a total of seven geomagnetic excursions between 1.6 million and 0.8 million years before present, providing the best record of changes in Earth’s magnetic field direction in the Northern Hemisphere around the Brunhes-Matuyama reversal, the last magnetic reversal that occurred 0.78 million years ago and hence one of the most important marker events in Earth’s history.

Seven of the nine excursions that the authors identified in the Nihewan Basin had not previously been well-identified in any other terrestrial archive in China. By tying the large excursions to well-defined global reversal events and the smaller ones to more local excursion events that had been previously reported, the authors derive a timescale of hominid migration. Their geomagnetic timescale indicates that the paleolithic sites Feiliang and Lanpo are around 1.2 million and 1.65 million years old, respectively, suggesting that early hominids migrated out of Africa and settled in northern China prior to 1.5 million years ago, long before the last major reversal took place on Earth.

Source: Geochemistry Geophysics Geosystems, doi:10.1029/2012GC004095, 2012
Title: “High-resolution record of geomagnetic excursions in the Matuyama chron constrains the ages of the Feiliang and Lanpo Paleolithic sites in the Nihewan Basin, North China;”

Authors:Hong Ao, Zhisheng An, Hui Zhao, Hongli Zhao, Xiaoke Qiang, Hong ChangState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China;Mark J. DekkersDepartment of Earth Sciences, Utrecht University, Utrecht, The Netherlands;Qi Wei, Shuwen PeiInstitute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China;Guoqiao XiaoState Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China;Dacheng WuResearch Institute of Exploration and Development, Tarim Oilfield Company, Korla, China.

Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

LION'S MANE PRODUCT

Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules

Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.

Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.

Comments

Visits:	1,708,746,406
Stories:	8,451,208