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"Problems with the early dating
Around 10,450 BCE, when Hancock proposes that the Great Sphinx (and, by implication, the Valley Temple of Kha‘efrē‘’s pyramid and the Osireion at Abydos were built) the Western Desert was still in its period of greatest aridity. Even in the Nile valley, rainfall was minimal. This would have made life difficult for humans. During what is known as the Late Palaeolithic Alluviation, beginning before 20,000 BP and lasting until about 10,500 BCE, the Nile brought less water than today. This was caused by two main factors: the world-wide dryness caused by the ‘locking up’ of water in the huge ice caps of the Pleistocene glaciation and because the White Nile did not drain into the Nile valley at this time, its northward path was blocked by sand dunes in the Sudd. At the same time, the slower river carried more sediment, which built up the floodplain until it was some 25-30 m higher than today. The river was sluggish and would have flowed in numerous braided channels. As the ice caps shrank after c 10,500 BC, an increase in rainfall at the headwaters of the Blue Nile in East Africa, combined with the White Nile breaking through the dunes in the Sudd, led to a brief period of exceptionally high floods, known to geologists as the ‘Wild Nile’. This increased flow eroded the sediments that had accumulated during the previous eight thousand years. Within a few centuries, the Nile had become a powerful stream, flowing in a single deeply incised channel, with a narrow floodplain that was prone to heavy flooding. Nevertheless, rainfall in the Nile valley itself remained low until about 9000 BCE, making settled life in the valley difficult."
Who determined what the weather was like during the 50,000 years that the ice was a factor? Humidity would have been low over the ice but the lower latitudes could have been quite warm. Does anybody know if the ice advanced so far and stayed there of if it started rededing as soon as it got it's largest size? Have the remains of any plants been found at that latitude that would give an estimate of what the temp was. Wre the wind patterns the same today as they were during the time of the ice?
Who dated when the sand got there? As I already mentioned NASA did a scan of the Saraha and found the remains of river beds, when did they flow, it would be possible to tell which way they flowed just by a quick look at a photo.
Does that mean the whole Saraha was 30m higher. That would be a lot of sand that went into the Med. Is there that much there, it still seems plenty deep.
http://visibleearth.nasa.gov/view_rec.php?id=1794
The ice would have affected the level of the oceans, not the humity at the worlds warmest spots If they were created by snow-fall then further south the moisture would have been rain. The fastest evaporation should have been at the equator, that doesn't mean some didn't also fall there
Can questions like that be asked without getting booed off the stage.
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These unfavourable climatic conditions virtually preclude the use of the Nile valley by the remnants of Hancock’s ‘lost civilisation’; hunter gatherers would have found few plants or animal to exploit, while farmland would have devastated by frequent floods and the shifting of the numerous braided river channels. Population levels would have been small and communities necessarily mobile. Moreover, the sites of the Great Sphinx, the Valley Temple and the Osireion were covered by a considerable depth of alluvial deposits at this time; if they had been built in the eleventh millennium BCE, they would have been at the bottom of pits 25 to 30 m deep! This geological evidence makes archaeological questions irrelevant. It is difficult to see how society could have flourished in such an environment, especially one with a predilection for building permanent monuments."
Or if the ice-sheets were a fairly stable size for most of their time the weather might have been fairly predictable.
A link or reference to the article that explains the 'alluvial deposits' being there would have been a interesting read, as it stands we can only take it as a summation thought with no explanation given.
Deserts may have only come with the receding ice. Less wind from the north (how far they went south) could be enough to affect precipitation bands. Put cooler air over warm air (I know the warm air should be on top, with winds it doesn't always work that way), it does go that way when the cooler air rushes south along the ground and it pushes the warmer air up, that always results in moisture coming back down. Ocean currents might have also been quite different. Warm going just north (no surface currents going south. The cold currents would have been along the seabed.
