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Message Area
Earth/Space Science

Unzipping East Africa

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#1 of 3

     Posted Nov-5 8:23 AM   
Francis X. Neumann, Jr.
 
From  Francis X. Neumann, Jr.  Posts 4035  Last Nov-19
To  All      [Msg # 129406.1 ]    

"A 35-mile rift in the desert of Ethiopia will likely become a new ocean eventually, researchers now confirm.  The crack, 20 feet wide in spots, opened in 2005 and some geologists believed then that it would spawn a new ocean. But that view was controversial, and the rift had not been well studied....Using newly gathered seismic data from 2005, researchers reconstructed the event to show the rift tore open along its entire 35-mile length in just days. Dabbahu, a volcano at the northern end of the rift, erupted first, then magma pushed up through the middle of the rift area and began 'unzipping the rift in both directions, the researchers explained in a statement today."

See: http://www.livescience.com/environment/091102-africa-rift-ocean.html

Details on the 2005 eruption of Dabbahu and its location...

See: http://www.networkmirror.com/wXts44xaAl_lxwZz/www.volcano.si.edu/world/volcano.cfm%3Fvnum%3D0201-113&volpage%3Dvar.html

Lastly, some great aerial shots of the area...

See: http://homepages.see.leeds.ac.uk/~eartjw/dabbahu/photos.html

Frank Neumann

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#2 of 3

     Posted Nov-5 10:09 AM   
Jon Woolf - Sysop
 
From  Jon Woolf - Sysop  Posts 1618  Last 9:05 PM
To  Francis X. Neumann, Jr.      [Msg # 129406.2 Message 129406.2 replying to 129406.1 129406.1 ]    
Something a bit odd about that report.  It connects this "new rift" to the Red Sea/Gulf of Aden, to create the three-armed pattern that is thought to be typical of rifts.  But longstanding geologic consensus already recognizes a third arm for the Red Sea/Gulf of Aden dome: the East Rift Valley that runs south across the Horn of Africa, then south through Kenya, Tanzania, and Malawi, and ends in central Mozambique.  Is this "new rift" simply part of the East Rift complex?  Or is there something truly new about it?

-- JSW
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#3 of 3

     Posted Nov-5 10:43 AM   
Francis X. Neumann, Jr.
 
From  Francis X. Neumann, Jr.  Posts 4035  Last Nov-19
To  Jon Woolf - Sysop      [Msg # 129406.3 Message 129406.3 replying to 129406.2 129406.2 ]    

I dunno.  All I can do is refer back to the map of the rifts in the area.


Figure 1

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Earth/Space Science

Unzipping East Africa

  
 
     

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