to be attributed to the Châtelperronian (also called Lower Périgordian) culture is debated among specialists. Nonetheless there are Châtelperronian remains (deposited between 33,000 and 29,000 BCE) that were found in the Basque Country in caves such as Santimamiñe (Biscay), Labeko Koba, Ekain (Gipuzkoa), Isturitz (Lower Navarre) and Gatzarria (Soule) as well as the open-air site of Le Basté (Labourd). Aurignacian culture Artefacts of the Aurignacian culture, in particular Proto-Aurignacian objects have been found in Gatzarria and Labeko Koba. The Aurignacian II is found in a few sites in Labourd: Le Basté and Bidart. The Evolved Aurignacian is found mainly in Biscay and Gipuzkoa, at the sites of Lezetxiki, Aiztbitaterte IV, Koskobilo, Benta Laperra, Kurtzia and Lumentxa. Gravettian culture The Gravettian period (also known as Périgordian) according to the classical French sequence, assimilates Chatelperronian and Gravettian in one single cultural complex. Most of the findings belong to the upper and final Périgordian (V and VI): Santimamiñe, Atxurra, Bolinkoba, Amalda, Aitzbitarte III, Lezia, Isturitz and Gatzarria. The final phase of Périgordian VII is only found in Amalda (Gipuzkoa). Solutrean culture The Solutrean culture spans between around 18,000 to 15,000 BCE and only exists in the European south west, being coincident with the Last glacial maximum, a specially dry and cold period. Studies suggest that the higher regions of the western Pyrenees and massifs of the eastern Cantabrian Cordillera were only sparsely populated as glaciers descended to very low elevations and maximum sea level regression exposed another of the surrounding continental shelf. In fact Human population seems to have increased in these areas of Cantabria/Asturias, the result of a gradual influx of people, forced to abandon territories in north-western Europe that have become off limits due to maximum glacial conditions. ″The Solutrean represents technological developments in weaponry, presumably for increased efficiency and effectiveness in hunting in the face of worsening environmental conditions and increased regional human population density. In the Basque Country, Solutrean points were added onto an extant lithic technology usually characterizable as Gravettian with Noailles burins.″ The Basque Solutrean facies is intermediate between the Cantabrian and Pyrenean ones and is found specially in Aitzbitarte IV, Bolinkoba, Santimamiñe, Koskobilo, Isturitz, Hareguy, Ermittia and Amalda. Magdalenian culture The Magdalenian culture can be found between around 15,000 and 8500 BCE and is widespread in Western - and later, Central Europe. Modern humans recolonize territories lost during the Last Glacial Maximum (LGM) and push into