Cave of Altamira time period Paleolithic
The Cave of Altamira (; Spanish: Cueva de Altamira [ˈkweβa ðe altaˈmiɾa]) is a cave complex, located near the historic town of Santillana del Mar in Cantabria, Spain. It is renowned for prehistoric cave art featuring charcoal drawings and polychrome paintings of contemporary local fauna and human hands. The earliest paintings were applied during the Upper Paleolithic, around 36,000 years ago. The site was discovered in 1868 by Modesto Cubillas and subsequently studied by Marcelino Sanz de Sautuola.Aside from the striking quality of its polychromatic art, Altamira's fame stems from the fact that its paintings were the first European cave paintings for which a prehistoric origin was suggested and promoted. Sautuola published his research with the support of Juan de Vilanova y Piera in 1880, to initial public acclaim.
However, the publication of Sanz de Sautuola's research quickly led to a bitter public controversy among experts, some of whom rejected the prehistoric origin of the paintings on the grounds that prehistoric human beings lacked sufficient ability for abstract thought. The controversy continued until 1902, by which time reports of similar findings of prehistoric paintings in the Franco-Cantabrian region had accumulated and the evidence could no longer be rejected.Altamira is located in the Franco-Cantabrian region and in 1985 was declared a World Heritage Site by UNESCO as a key location of the Cave of Altamira and Paleolithic Cave Art of Northern Spain.  The cave can no longer be visited, for conservation reasons, but there are replicas of a section at the site and elsewhere.Description
The cave is approximately 1,000 m (3,300 ft) long and consists of a series of twisting passages and chambers. The main passage varies from two to six meters in height. The cave was formed through collapses following early karst phenomena in the calcareous rock of Mount Vispieres.
Archaeological excavations in the cave floor found rich deposits of artifacts from the Upper Solutrean (c. 18,500 years ago) and Lower Magdalenian (between c. 16,590 and 14,000 years ago). Both periods belong to the Paleolithic or Old Stone Age. In the two millennia between these two occupations, the cave was evidently inhabited only by wild animals.
Human occupants of the site were well-positioned to take advantage of the rich wildlife that grazed in the valleys of the surrounding mountains as well as the marine life available in nearby coastal areas. Around 13,000 years ago a rockfall sealed the cave's entrance, preserving its contents until its eventual discovery, which occurred after a nearby tree fell and disturbed the fallen rocks.
Human occupation was limited to the cave mouth, although paintings were created throughout the length of the cave. The artists used charcoal and ochre or hematite to create the images, often diluting these pigments to produce variations in intensity and creating an impression of chiaroscuro. They also exploited the natural contours of the cave walls to give their subjects a three-dimensional effect. The Polychrome Ceiling is the most impressive feature of the cave, depicting a herd of extinct steppe bison (Bison priscus) in different poses, two horses, a large doe, and possibly a wild boar.Dating and periodization
There is no scientific agreement on the dating of the archeological artifacts found in the cave, nor the drawings and paintings, and scientists continue to evaluate the age of the cave art at Altamira.
In 2008, researchers using uranium-thorium dating found that the paintings were completed over a period of up to 20,000 years rather than during a comparatively brief period.A later study published in 2012 based on data obtained from further uranium-thorium dating research, dated some paintings in several caves in North Spain, including some of the claviform signs in the "Gran sala" of Altamira. The oldest sign found, a "large red claviform-like symbol of Techo de los Polícromos", was dated to  36.16±0.61 ka (corrected), i.e. still well within the Aurignacian. A red dotted outline horse, also in the Techo de los Polícromos chamber, was dated to  22.11±0.13 ka (beginning Solutrean), establishing that the paintings span a period of more than 10,000 years.
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