[Illustration: _How blades were split off a core. The technique was perfected by the Gravettians, an Aurignacian people, and was practiced by the Aztecs of Mexico. (After Evans, 1872.)_]
Henry Fairfield Osborn once dated the European advent of the Aurignacians at about 27,000 years ago, Nelson at 20,000, Mather at 15,000.[22] Zeuner, however, believes they flourished from about 100,000 until 75,000 years ago.[23] Dating the last of the glaciers was the key to this dispute. Radiocarbon dates now suggest that the Aurignacian period survived in Europe and the Near East until 18,000 to 34,000 years ago.[24] Its beginnings may well extend beyond the range of this method.
[Illustration: _Upper Paleolithic tools from long flakes taken off cores after the manner shown on page 100. The burin, or graver, at the upper left is probably Upper Aurignacian, though commoner in the Magdalenian culture. The others are usually called blades. (The burin, after Burkitt, 1933; the blades, after MacCurdy, 1924.)_]
The Aurignacians are a variegated lot, which argues further for subdividing them. One specimen, the tall, high-domed Cro-Magnon, is variously credited with producing the modern European man, the Eskimo, and even the Indian of America. Another specimen, the Grimaldi from the Riviera, is distinctly Negroid. Another—from hints in several places—seems to be Mongoloid. Apparently, the Aurignacians were almost variegated enough to have peopled the modern world. But almost as much could be said for the inhabitants of an upper level in the Choukoutien Cave near Peking. There, in one spot, they divide nicely into Negroid, Eskimoid, and Melanesoid.
Toward the close of Aurignacian times comes a remarkable people called the Solutreans. They appear quite suddenly as invading hunters, and they disappear as suddenly. Their culture does not evolve out of the Aurignacian, and it does not evolve into the next culture, the Magdalenian. The Solutreans stayed a relatively short time in Europe; Braidwood once gave them 10,000 years, but Mather and Peake and Fleure only 500.[25] Guesses as to when they arrived vary as widely. Peake and Fleure think it was about 12,000 years ago, while Zeuner puts them back to 67,000 years before our time.[26] Radiocarbon dates indicate only 18,000 years ago.