The Azilian is a Mesolithic industry of the Franco-Cantabrian region of northern Spain and Southern France. It dates approximately 10,000–12,500 years ago. Diagnostic artifacts from the culture include projectile points (microliths with rounded retouched backs), crude flat bone harpoons and pebbles with abstract decoration. The latter were first found in the River Arize at the type-site for the culture, the Grotte du Mas d'Azil at Le Mas-d'Azil in the French Pyrenees (illustrated, now with a modern road running through it). These are the main type of Azilian art, showing a great reduction in scale and complexity from the Magdalenian Art of the Upper Palaeolithic. The industry can be classified as part of the Epipaleolithic or the Mesolithic periods, or of both. Archaeologists think the Azilian represents the tail end of the Magdalenian as the warming climate brought about changes in human behaviour in the area. The effects of melting ice sheets would have diminished the food supply and probably impoverished the previously well-fed Magdalenian manufacturers, or at least those who had not followed the herds of horse and reindeer out of the glacial refugium to new territory. As a result, Azilian tools and art were cruder and less expansive than their Ice Age predecessors - or simply different. Terminology The Azilian was named by Édouard Piette, who excavated the Mas d'Azil type-site in 1887. Unlike other coinages by Piette, the name was generally accepted, indeed in the early 20th century used for much greater areas than it is today. Henry Fairfield Osborn, president of the American Museum of Natural History and a palaeontologist rather than an archaeologist, was taken around the sites by leading excavators such as Hugo Obermaier. The popularizing book he published in 1916, Men of the Old Stone Age talks happily of Azilian sites as far north as Oban in Scotland, wherever flattened barbed "harpoon" points of deer antler are found. Subsequently, Azilian types of artefact have been defined more precisely, and similar examples from beyond the Franco-Cantabrian region generally excluded and reassigned, although references to "Azilian" finds much further north than the Franco-Cantabrian region still appear in non-specialized sources. Terms like "Azilian-like" and even "epi-Azilian" may be used to describe such finds. Characteristics The Azilian in Vasco-Cantabria occupied a similar region to the Magdalenian, and in very many cases the same sites; typically the Azilian remains are fewer, and rather simpler, than those from the Magdalenian