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| The Sahara Desert |
Originally interpreted as an asteroid impact structure because of its high level of circularity , and then as a structure formed by a volcanic eruption also seems unlikely because of the lack of volcanic or igneous domes , is now said to be very symmetrical and very eroded geology of the dome collapsed . So now considered by many to be caused by uplifted rock carved by erosion . But the fact that the " ring " , is equal to the center and a circular structure remains a mystery .
This is an interesting viewpoint and deserves further investigation . However, this area is quite dangerous for the moment . The first thing to do is investigate the depressed corridor access to the " eye " of the West . This is probably the ancient canal or delta and the only access to the Atlantic Ocean . It is much easier to get a result there directly because of " eyes " piecemeal collapse and geological changes that make the discovery difficult .
Most experts geological data there is says : " According to the data field mapping and aeromagnetic , gabbroic rocks forming two concentric rings . Rings is approximately 20 m wide and located about 3 km from the center of the structure . Outer ring is approximately 50 m in width and is located about 7 up to 8 km from the center of the structure . Thirty-two carbonatite dikes have been mapped in the structure .
Dikes are generally about 300 m long and usually 1 to 4 m wide . They consist of a large carbonatites are largely devoid of vesicles . Carbonatite rocks have been dated as cause has cooled between 94-104 million years ago . A plug kimberlitic has been found in the northern part of the structure . Kimberlite was estimated to be approximately 99 million years . This is an intrusive igneous rock is interpreted as an indication of alkaline igneous intrusions large current and underlying structures are created by lifting stones on top " .
When it comes to the age of 100 million years of geological structure , we have to remember this , but if the old stratas are lifted it is normal . And we get extensive hydrothermal alteration and rhyolite and gabbros central megabreccia created by hydrothermal dissolution and collapse there his experts know that 40,000 years ago there was a large lake in the Sahara .
We know that the Sahara still has moisture 6500BC . Sahara desert which covers ten African countries with 9.4 million square kilometers is 100 Million years ago, all covered by the sea . So in any case it is assumed that this is a viable research attention .
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