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These images have been dated to at least 39,000 BCE and 35,500 BCE respectively, making them the oldest art of their type from a cave in Europe.
A polychrome cave painting consists of two or more colours, as exemplified by the glorious multi-coloured images of bison on the ceiling at Altamira, or the magnificent aurochs in the Chamber of the Bulls at Lascaux.
In contrast, the term "cave drawing" refers (strictly speaking) only to an engraved drawing - that is, one made by cutting lines in the rock surface with a flint or stone tool, rather than one made by drawing lines with charcoal or manganese.
For more about the evolution of cave painting, and how it fits into Stone Age culture, see: Prehistoric Art Timeline (from 2.5 million BCE).
For details of arts & culture during the Pleistocene and Holocene epochs, see: Irish Stone Age Art Mainly megalithic architecture Irish Bronze Age Art Celtic metalwork, tomb-building Irish Iron Age Art La Tene Celtic culture, sculpture The majority of prehistoric cave paintings were figurative and 99 percent of these were of animals.
Second, the completed drawing of the animal would be coloured or filled in with red ochre or other pigments.