A certain paper by Answers in Genesis supports the idea biblical Shinar and Amarna and Egyptian Sangar were not in Southern Mesopotamia, but in the area of modern Sinjar. The advantage in this solution is that its identification of Gen 10:10’s Calneh with Washshukanni, which, however, was destroyed long before Carchemish (Isaiah 10:9). Velikovsky’s solution is, as well confirmed in some of my other posts, nothing but pure, solid, bullshit. The disadvantage? Its transfer of several important places in Gen 10:9, such as Babel, Uruk and Akkad, is quite impossible. The identification of Southern Mesopotamia with Shinar is proven beyond doubt here.