Complex sentence: There was greater elaboration during 16-10,000 years B.C. (Magdalenense period), with a Paleolithic style, with an essentially anthropomorphic and zoomorphic designs that included horses with their characteristic manes, aurochs with mouths and nostrils and deer.
Split into simpler sentences: There was greater elaboration during 16-10,000 years B.C. (Magdalenense period), with a Paleolithic style. The essentially anthropomorphic and zoomorphic designs included horses identifiable by their characteristic manes, aurochs with mouths and nostrils indicated, and deer.