Andites moved to islands of. [1] Area of highly blended races. [2] Civilization disrupted by flood in 15,000 B.C. [3] Geology. [4] Land trade nearly suspended during nomadic invasions ca. 2500 B.C.; sea commerce in full swing. [5] Onagar’s headquarters. [6] Protected by Gibraltar isthmus and Sicilian land bridge in early days of violet race; floods upon their collapse. [7] Race of.